The relationships of groups of organisms as reflected by their genetic makeup.
The process of cumulative change at the level of DNA; RNA; and PROTEINS, over successive generations.
A multistage process that includes cloning, physical mapping, subcloning, determination of the DNA SEQUENCE, and information analysis.
The process of cumulative change over successive generations through which organisms acquire their distinguishing morphological and physiological characteristics.
Functions constructed from a statistical model and a set of observed data which give the probability of that data for various values of the unknown model parameters. Those parameter values that maximize the probability are the maximum likelihood estimates of the parameters.
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
Double-stranded DNA of MITOCHONDRIA. In eukaryotes, the mitochondrial GENOME is circular and codes for ribosomal RNAs, transfer RNAs, and about 10 proteins.
The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species.
The arrangement of two or more amino acid or base sequences from an organism or organisms in such a way as to align areas of the sequences sharing common properties. The degree of relatedness or homology between the sequences is predicted computationally or statistically based on weights assigned to the elements aligned between the sequences. This in turn can serve as a potential indicator of the genetic relatedness between the organisms.
A theorem in probability theory named for Thomas Bayes (1702-1761). In epidemiology, it is used to obtain the probability of disease in a group of people with some characteristic on the basis of the overall rate of that disease and of the likelihood of that characteristic in healthy and diseased individuals. The most familiar application is in clinical decision analysis where it is used for estimating the probability of a particular diagnosis given the appearance of some symptoms or test result.
Remains, impressions, or traces of animals or plants of past geological times which have been preserved in the earth's crust.
The intergenic DNA segments that are between the ribosomal RNA genes (internal transcribed spacers) and between the tandemly repeated units of rDNA (external transcribed spacers and nontranscribed spacers).
DNA sequences encoding RIBOSOMAL RNA and the segments of DNA separating the individual ribosomal RNA genes, referred to as RIBOSOMAL SPACER DNA.
The splitting of an ancestral species into daughter species that coexist in time (King, Dictionary of Genetics, 6th ed). Causal factors may include geographic isolation, HABITAT geometry, migration, REPRODUCTIVE ISOLATION, random GENETIC DRIFT and MUTATION.
Theoretical representations that simulate the behavior or activity of genetic processes or phenomena. They include the use of mathematical equations, computers, and other electronic equipment.
Constituent of the 40S subunit of eukaryotic ribosomes. 18S rRNA is involved in the initiation of polypeptide synthesis in eukaryotes.
Genotypic differences observed among individuals in a population.
Deoxyribonucleic acid that makes up the genetic material of CHLOROPLASTS.
Constituent of 30S subunit prokaryotic ribosomes containing 1600 nucleotides and 21 proteins. 16S rRNA is involved in initiation of polypeptide synthesis.
A field of study concerned with the principles and processes governing the geographic distributions of genealogical lineages, especially those within and among closely related species. (Avise, J.C., Phylogeography: The History and Formation of Species. Harvard University Press, 2000)
Constituent of the 60S subunit of eukaryotic ribosomes. 28S rRNA is involved in the initiation of polypeptide synthesis in eukaryotes.
The genetic complement of MITOCHONDRIA as represented in their DNA.
The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence.
The systematic arrangement of entities in any field into categories classes based on common characteristics such as properties, morphology, subject matter, etc.
The naturally occurring transmission of genetic information between organisms, related or unrelated, circumventing parent-to-offspring transmission. Horizontal gene transfer may occur via a variety of naturally occurring processes such as GENETIC CONJUGATION; GENETIC TRANSDUCTION; and TRANSFECTION. It may result in a change of the recipient organism's genetic composition (TRANSFORMATION, GENETIC).
Warm-blooded vertebrate animals belonging to the class Mammalia, including all that possess hair and suckle their young.
Members of the group of vascular plants which bear flowers. They are differentiated from GYMNOSPERMS by their production of seeds within a closed chamber (OVARY, PLANT). The Angiosperms division is composed of two classes, the monocotyledons (Liliopsida) and dicotyledons (Magnoliopsida). Angiosperms represent approximately 80% of all known living plants.
Genes that are located on the MITOCHONDRIAL DNA. Mitochondrial inheritance is often referred to as maternal inheritance but should be differentiated from maternal inheritance that is transmitted chromosomally.
The science dealing with the earth and its life, especially the description of land, sea, and air and the distribution of plant and animal life, including humanity and human industries with reference to the mutual relations of these elements. (From Webster, 3d ed)
Gymnosperms are a group of vascular plants whose seeds are not enclosed by a ripened ovary (fruit), in contrast to ANGIOSPERMS whose seeds are surrounded by an ovary wall. The seeds of many gymnosperms (literally, "naked seed") are borne in cones and are not visible. Taxonomists now recognize four distinct divisions of extant gymnospermous plants (CONIFEROPHYTA; CYCADOPHYTA; GINKGOPHYTA; and GNETOPHYTA).
Animals that have no spinal column.
Deoxyribonucleic acid that makes up the genetic material of plants.
Self-replicating cytoplasmic organelles of plant and algal cells that contain pigments and may synthesize and accumulate various substances. PLASTID GENOMES are used in phylogenetic studies.
Members of the phylum Arthropoda, composed of organisms having a hard, jointed exoskeleton and paired jointed legs. It includes the class INSECTS and the subclass ARACHNIDA, many species of which are important medically as parasites or as vectors of organisms capable of causing disease in man.
The most abundant form of RNA. Together with proteins, it forms the ribosomes, playing a structural role and also a role in ribosomal binding of mRNA and tRNAs. Individual chains are conventionally designated by their sedimentation coefficients. In eukaryotes, four large chains exist, synthesized in the nucleolus and constituting about 50% of the ribosome. (Dorland, 28th ed)
'Primates' is a taxonomic order comprising various species of mammals, including humans, apes, monkeys, and others, distinguished by distinct anatomical and behavioral characteristics such as forward-facing eyes, grasping hands, and complex social structures.
A set of genes descended by duplication and variation from some ancestral gene. Such genes may be clustered together on the same chromosome or dispersed on different chromosomes. Examples of multigene families include those that encode the hemoglobins, immunoglobulins, histocompatibility antigens, actins, tubulins, keratins, collagens, heat shock proteins, salivary glue proteins, chorion proteins, cuticle proteins, yolk proteins, and phaseolins, as well as histones, ribosomal RNA, and transfer RNA genes. The latter three are examples of reiterated genes, where hundreds of identical genes are present in a tandem array. (King & Stanfield, A Dictionary of Genetics, 4th ed)
The variety of all native living organisms and their various forms and interrelationships.
Processes occurring in various organisms by which new genes are copied. Gene duplication may result in a MULTIGENE FAMILY; supergenes or PSEUDOGENES.
One of the three domains of life (the others being BACTERIA and ARCHAEA), also called Eukarya. These are organisms whose cells are enclosed in membranes and possess a nucleus. They comprise almost all multicellular and many unicellular organisms, and are traditionally divided into groups (sometimes called kingdoms) including ANIMALS; PLANTS; FUNGI; and various algae and other taxa that were previously part of the old kingdom Protista.
The genetic complement of an organism, including all of its GENES, as represented in its DNA, or in some cases, its RNA.
The genetic complement of a BACTERIA as represented in its DNA.
Warm-blooded VERTEBRATES possessing FEATHERS and belonging to the class Aves.
Animals having a vertebral column, members of the phylum Chordata, subphylum Craniata comprising mammals, birds, reptiles, amphibians, and fishes.
Genes, found in both prokaryotes and eukaryotes, which are transcribed to produce the RNA which is incorporated into RIBOSOMES. Prokaryotic rRNA genes are usually found in OPERONS dispersed throughout the GENOME, whereas eukaryotic rRNA genes are clustered, multicistronic transcriptional units.
The ceasing of existence of a species or taxonomic groups of organisms.
The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.
A field of biology concerned with the development of techniques for the collection and manipulation of biological data, and the use of such data to make biological discoveries or predictions. This field encompasses all computational methods and theories for solving biological problems including manipulation of models and datasets.
The sequential correspondence of nucleotides in one nucleic acid molecule with those of another nucleic acid molecule. Sequence homology is an indication of the genetic relatedness of different organisms and gene function.
The relationship between two different species of organisms that are interdependent; each gains benefits from the other or a relationship between different species where both of the organisms in question benefit from the presence of the other.
Multicellular, eukaryotic life forms of kingdom Plantae (sensu lato), comprising the VIRIDIPLANTAE; RHODOPHYTA; and GLAUCOPHYTA; all of which acquired chloroplasts by direct endosymbiosis of CYANOBACTERIA. They are characterized by a mainly photosynthetic mode of nutrition; essentially unlimited growth at localized regions of cell divisions (MERISTEMS); cellulose within cells providing rigidity; the absence of organs of locomotion; absence of nervous and sensory systems; and an alternation of haploid and diploid generations.
A set of statistical methods used to group variables or observations into strongly inter-related subgroups. In epidemiology, it may be used to analyze a closely grouped series of events or cases of disease or other health-related phenomenon with well-defined distribution patterns in relation to time or place or both.
The systematic study of the complete DNA sequences (GENOME) of organisms.
A phylum of fungi which have cross-walls or septa in the mycelium. The perfect state is characterized by the formation of a saclike cell (ascus) containing ascospores. Most pathogenic fungi with a known perfect state belong to this phylum.
A plant division that includes hornworts, named for the horn-like appearance of the spore-producing plant (sporophyte).
A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.
A suborder of PRIMATES consisting of the following five families: CHEIROGALEIDAE; Daubentoniidae; Indriidae; LEMURIDAE; and LORISIDAE.
One of the three domains of life (the others being BACTERIA and Eukarya), formerly called Archaebacteria under the taxon Bacteria, but now considered separate and distinct. They are characterized by: (1) the presence of characteristic tRNAs and ribosomal RNAs; (2) the absence of peptidoglycan cell walls; (3) the presence of ether-linked lipids built from branched-chain subunits; and (4) their occurrence in unusual habitats. While archaea resemble bacteria in morphology and genomic organization, they resemble eukarya in their method of genomic replication. The domain contains at least four kingdoms: CRENARCHAEOTA; EURYARCHAEOTA; NANOARCHAEOTA; and KORARCHAEOTA.
A functional system which includes the organisms of a natural community together with their environment. (McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)
Deoxyribonucleic acid that makes up the genetic material of bacteria.
One of the three domains of life (the others being Eukarya and ARCHAEA), also called Eubacteria. They are unicellular prokaryotic microorganisms which generally possess rigid cell walls, multiply by cell division, and exhibit three principal forms: round or coccal, rodlike or bacillary, and spiral or spirochetal. Bacteria can be classified by their response to OXYGEN: aerobic, anaerobic, or facultatively anaerobic; by the mode by which they obtain their energy: chemotrophy (via chemical reaction) or PHOTOTROPHY (via light reaction); for chemotrophs by their source of chemical energy: CHEMOLITHOTROPHY (from inorganic compounds) or chemoorganotrophy (from organic compounds); and by their source for CARBON; NITROGEN; etc.; HETEROTROPHY (from organic sources) or AUTOTROPHY (from CARBON DIOXIDE). They can also be classified by whether or not they stain (based on the structure of their CELL WALLS) with CRYSTAL VIOLET dye: gram-negative or gram-positive.
Peptide elongation factor 1 is a multisubunit protein that is responsible for the GTP-dependent binding of aminoacyl-tRNAs to eukaryotic ribosomes. The alpha subunit (EF-1alpha) binds aminoacyl-tRNA and transfers it to the ribosome in a process linked to GTP hydrolysis. The beta and delta subunits (EF-1beta, EF-1delta) are involved in exchanging GDP for GTP. The gamma subunit (EF-1gamma) is a structural component.
A phylum of acoelomate, bilaterally symmetrical flatworms, without a definite anus. It includes three classes: Cestoda, Turbellaria, and Trematoda.
Deoxyribonucleic acid that makes up the genetic material of fungi.
Sequential operating programs and data which instruct the functioning of a digital computer.
The degree of similarity between sequences. Studies of AMINO ACID SEQUENCE HOMOLOGY and NUCLEIC ACID SEQUENCE HOMOLOGY provide useful information about the genetic relatedness of genes, gene products, and species.
The sequential location of genes on a chromosome.
An order of wholly aquatic MAMMALS occurring in all the OCEANS and adjoining seas of the world, as well as in certain river systems. They feed generally on FISHES, cephalopods, and crustaceans. Most are gregarious and most have a relatively long period of parental care and maturation. Included are DOLPHINS; PORPOISES; and WHALES. (From Walker's Mammals of the World, 5th ed, pp969-70)
A group of cold-blooded, aquatic vertebrates having gills, fins, a cartilaginous or bony endoskeleton, and elongated bodies covered with scales.
The functional genetic units of ARCHAEA.
*Medical Definition:* 'Lizards' are not typically defined in the field of medicine, as they are a type of reptile and not a medical condition or healthcare-related concept; however, certain lizard species such as the Gila monster and beaded lizards possess venomous bites, which can lead to medical emergencies like envenomation requiring medical attention.
Plants of the division Rhodophyta, commonly known as red algae, in which the red pigment (PHYCOERYTHRIN) predominates. However, if this pigment is destroyed, the algae can appear purple, brown, green, or yellow. Two important substances found in the cell walls of red algae are AGAR and CARRAGEENAN. Some rhodophyta are notable SEAWEED (macroalgae).
A phylum of EUKARYOTES characterized by the presence of cilia at some time during the life cycle. It comprises three classes: KINETOFRAGMINOPHOREA; OLIGOHYMENOPHOREA; and POLYMENOPHOREA.
The study of early forms of life through fossil remains.
Any of the DNA in between gene-coding DNA, including untranslated regions, 5' and 3' flanking regions, INTRONS, non-functional pseudogenes, and non-functional repetitive sequences. This DNA may or may not encode regulatory functions.
The class Insecta, in the phylum ARTHROPODA, whose members are characterized by division into three parts: head, thorax, and abdomen. They are the dominant group of animals on earth; several hundred thousand different kinds having been described. Three orders, HEMIPTERA; DIPTERA; and SIPHONAPTERA; are of medical interest in that they cause disease in humans and animals. (From Borror et al., An Introduction to the Study of Insects, 4th ed, p1)
Family of the suborder HAPLORHINI (Anthropoidea) comprising bipedal primate MAMMALS. It includes modern man (HOMO SAPIENS) and the great apes: gorillas (GORILLA GORILLA), chimpanzees (PAN PANISCUS and PAN TROGLODYTES), and orangutans (PONGO PYGMAEUS).
A kingdom of eukaryotic, heterotrophic organisms that live parasitically as saprobes, including MUSHROOMS; YEASTS; smuts, molds, etc. They reproduce either sexually or asexually, and have life cycles that range from simple to complex. Filamentous fungi, commonly known as molds, refer to those that grow as multicellular colonies.
Those nucleic acid sequences that function as units of heredity which are located within the CHLOROPLAST DNA.
Constituent of the 60S subunit of eukaryotic ribosomes. 5.8S rRNA is involved in the initiation of polypeptide synthesis in eukaryotes.
A class in the phylum MOLLUSCA comprised of SNAILS and slugs. The former have coiled external shells and the latter usually lack shells.
One of the Indian Ocean Islands off the southeast coast of Africa. Its capital is Antananarivo. It was formerly called the Malagasy Republic. Discovered by the Portuguese in 1500, its history has been tied predominantly to the French, becoming a French protectorate in 1882, a French colony in 1896, and a territory within the French union in 1946. The Malagasy Republic was established in the French Community in 1958 but it achieved independence in 1960. Its name was changed to Madagascar in 1975. (From Webster's New Geographical Dictionary, 1988, p714)
An order of flagellate protozoa. Characteristics include the presence of one or two flagella arising from a depression in the cell body and a single mitochondrion that extends the length of the body.
A phylum of photosynthetic EUKARYOTA bearing double membrane-bound plastids containing chlorophyll a and b. They comprise the classical green algae, and represent over 7000 species that live in a variety of primarily aquatic habitats. Only about ten percent are marine species, most live in freshwater.
In vitro method for producing large amounts of specific DNA or RNA fragments of defined length and sequence from small amounts of short oligonucleotide flanking sequences (primers). The essential steps include thermal denaturation of the double-stranded target molecules, annealing of the primers to their complementary sequences, and extension of the annealed primers by enzymatic synthesis with DNA polymerase. The reaction is efficient, specific, and extremely sensitive. Uses for the reaction include disease diagnosis, detection of difficult-to-isolate pathogens, mutation analysis, genetic testing, DNA sequencing, and analyzing evolutionary relationships.
A genus of the family HYLOBATIDAE consisting of six species. The members of this genus inhabit rain forests in southeast Asia. They are arboreal and differ from other anthropoids in the great length of their arms and very slender bodies and limbs. Their major means of locomotion is by swinging from branch to branch by their arms. Hylobates means dweller in the trees. Some authors refer to Symphalangus and Nomascus as Hylobates. The six genera include: H. concolor (crested or black gibbon), H. hoolock (Hoolock gibbon), H. klossii (Kloss's gibbon; dwarf siamang), H. lar (common gibbon), H. pileatus (pileated gibbon), and H. syndactylus (siamang). H. lar is also known as H. agilis (lar gibbon), H. moloch (agile gibbon), and H. muelleri (silvery gibbon).
A phylum of fungi that produce their sexual spores (basidiospores) on the outside of the basidium. It includes forms commonly known as mushrooms, boletes, puffballs, earthstars, stinkhorns, bird's-nest fungi, jelly fungi, bracket or shelf fungi, and rust and smut fungi.
The science of the earth and other celestial bodies and their history as recorded in the rocks. It includes the study of geologic processes of an area such as rock formations, weathering and erosion, and sedimentation. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Cells lacking a nuclear membrane so that the nuclear material is either scattered in the cytoplasm or collected in a nucleoid region.
Databases devoted to knowledge about specific genes and gene products.
An order of insect eating MAMMALS including MOLES; SHREWS; HEDGEHOGS and tenrecs.
A group of the proteobacteria comprised of facultatively anaerobic and fermentative gram-negative bacteria.
A monocot family within the order Liliales. This family is divided by some botanists into other families such as Convallariaceae, Hyacinthaceae and Amaryllidaceae. Amaryllidaceae, which have inferior ovaries, includes CRINUM; GALANTHUS; LYCORIS; and NARCISSUS and are known for AMARYLLIDACEAE ALKALOIDS.
A sequence of amino acids in a polypeptide or of nucleotides in DNA or RNA that is similar across multiple species. A known set of conserved sequences is represented by a CONSENSUS SEQUENCE. AMINO ACID MOTIFS are often composed of conserved sequences.
Direct nucleotide sequencing of gene fragments from multiple housekeeping genes for the purpose of phylogenetic analysis, organism identification, and typing of species, strain, serovar, or other distinguishable phylogenetic level.
The genetic complement of a plant (PLANTS) as represented in its DNA.
A large plant family of the order Asterales, subclass Asteridae, class Magnoliopsida. The family is also known as Compositae. Flower petals are joined near the base and stamens alternate with the corolla lobes. The common name of "daisy" refers to several genera of this family including Aster; CHRYSANTHEMUM; RUDBECKIA; TANACETUM.
I'm sorry for any confusion, but there seems to be a misunderstanding as "South America" is not a medical term and cannot have a medical definition. It is a geographical term referring to the southern portion of the American continent, consisting of twelve independent countries and three territories of other nations.
The degree of similarity between sequences of amino acids. This information is useful for the analyzing genetic relatedness of proteins and species.
A class of EUKARYOTA (traditionally algae), characterized by biflagellated cells and found in both freshwater and marine environments. Pigmentation varies but only one CHLOROPLAST is present. Unique structures include a nucleomorph and ejectosomes.
The small ribonucleoprotein component of RIBOSOMES. It contains the MESSENGER RNA binding site and two TRANSFER RNA binding sites - one for the incoming AMINO ACYL TRNA (A site) and the other (P site) for the peptidyl tRNA carrying the elongating peptide chain.
Cells of the higher organisms, containing a true nucleus bounded by a nuclear membrane.
A large subphylum of mostly marine ARTHROPODS containing over 42,000 species. They include familiar arthropods such as lobsters (NEPHROPIDAE), crabs (BRACHYURA), shrimp (PENAEIDAE), and barnacles (THORACICA).
A plant genus of the family MORACEAE. It is the source of the familiar fig fruit and the latex from this tree contains FICAIN.
Short sequences (generally about 10 base pairs) of DNA that are complementary to sequences of messenger RNA and allow reverse transcriptases to start copying the adjacent sequences of mRNA. Primers are used extensively in genetic and molecular biology techniques.
The genetic complement of PLASTIDS as represented in their DNA.
"Panama" is not a recognized medical term or condition in healthcare and medicine. It might be a reference to a location, but it does not have a specific medical meaning in itself.
A phylum of bacteria consisting of the purple bacteria and their relatives which form a branch of the eubacterial tree. This group of predominantly gram-negative bacteria is classified based on homology of equivalent nucleotide sequences of 16S ribosomal RNA or by hybridization of ribosomal RNA or DNA with 16S and 23S ribosomal RNA.
The genetic constitution of individuals with respect to one member of a pair of allelic genes, or sets of genes that are closely linked and tend to be inherited together such as those of the MAJOR HISTOCOMPATIBILITY COMPLEX.
The functional hereditary units of BACTERIA.
The presence of two or more genetic loci on the same chromosome. Extensions of this original definition refer to the similarity in content and organization between chromosomes, of different species for example.
Ribonucleic acid in bacteria having regulatory and catalytic roles as well as involvement in protein synthesis.
The relative amounts of the PURINES and PYRIMIDINES in a nucleic acid.
A plant division. They are simple plants that lack vascular tissue and possess rudimentary rootlike organs (rhizoids). Like MOSSES, liverworts have alternation of generations between haploid gamete-bearing forms (gametophytes) and diploid spore-bearing forms (sporophytes).
The functional hereditary units of PLANTS.
Techniques for standardizing and expediting taxonomic identification or classification of organisms that are based on deciphering the sequence of one or a few regions of DNA known as the "DNA barcode".
Computer-based representation of physical systems and phenomena such as chemical processes.
The family of Old World monkeys and baboons consisting of two subfamilies: CERCOPITHECINAE and COLOBINAE. They are found in Africa and part of Asia.
The largest of the continents. It was known to the Romans more specifically as what we know today as Asia Minor. The name comes from at least two possible sources: from the Assyrian asu (to rise) or from the Sanskrit usa (dawn), both with reference to its being the land of the rising sun, i.e., eastern as opposed to Europe, to the west. (From Webster's New Geographical Dictionary, 1988, p82 & Room, Brewer's Dictionary of Names, 1992, p34)
Highly repeated sequences, 100-300 bases long, which contain RNA polymerase III promoters. The primate Alu (ALU ELEMENTS) and the rodent B1 SINEs are derived from 7SL RNA, the RNA component of the signal recognition particle. Most other SINEs are derived from tRNAs including the MIRs (mammalian-wide interspersed repeats).
The inanimate matter of Earth, the structures and properties of this matter, and the processes that affect it.
A plant family of the order Solanales, subclass Asteridae. Among the most important are POTATOES; TOMATOES; CAPSICUM (green and red peppers); TOBACCO; and BELLADONNA.
A phylum of the most familiar marine invertebrates. Its class Stelleroidea contains two subclasses, the Asteroidea (the STARFISH or sea stars) and the Ophiuroidea (the brittle stars, also called basket stars and serpent stars). There are 1500 described species of STARFISH found throughout the world. The second class, Echinoidea, contains about 950 species of SEA URCHINS, heart urchins, and sand dollars. A third class, Holothuroidea, comprises about 900 echinoderms known as SEA CUCUMBERS. Echinoderms are used extensively in biological research. (From Barnes, Invertebrate Zoology, 5th ed, pp773-826)
Artiodactyla is an order of mammals characterized by an even number of digits (two or four) on each foot, hooves as terminal appendages, and a specialized stomach for fermentative digestion, which includes taxonomic families such as Suidae, Cervidae, Bovidae, and Camelidae among others.
The genetic complement of an archaeal organism (ARCHAEA) as represented in its DNA.
An order of protozoa characterized by their ability to aggregate to form a multicellular pseudoplasmodium, which gives rise to a multispored fruiting body. A stalk tube is present.
A class in the phylum PROTEOBACTERIA comprised mostly of two major phenotypes: purple non-sulfur bacteria and aerobic bacteriochlorophyll-containing bacteria.
A large supergroup of mostly amoeboid EUKARYOTES whose three main subgroups are CERCOZOA; FORAMINIFERA; and HAPLOSPORIDA. Nearly all of the species possess MITOCHONDRIA and historically many were considered ANIMALS.
The physical measurements of a body.
A mammalian order which consists of 29 families and many genera.
An order of New World mammals characterized by the absence of incisors and canines from among their teeth, and comprising the ARMADILLOS, the SLOTHS, and the anteaters. The order is distinguished from all others by what are known as xenarthrous vertebrae (xenos, strange; arthron, joint): there are secondary, and sometimes even more, articulations between the vertebrae of the lumbar series. The order was formerly called Edentata. (From Random House Unabridged Dictionary, 2d ed; Walker's Mammals of the World, 5th ed, vol. I, p515)
A process that includes the determination of AMINO ACID SEQUENCE of a protein (or peptide, oligopeptide or peptide fragment) and the information analysis of the sequence.
The discipline studying genetic composition of populations and effects of factors such as GENETIC SELECTION, population size, MUTATION, migration, and GENETIC DRIFT on the frequencies of various GENOTYPES and PHENOTYPES using a variety of GENETIC TECHNIQUES.
An extensive order of highly specialized insects including bees, wasps, and ants.
An order of small mammals comprising two families, Ochotonidae (pikas) and Leporidae (RABBITS and HARES). Head and body length ranges from about 125 mm to 750 mm. Hares and rabbits have a short tail, and the pikas lack a tail. Rabbits are born furless and with both eyes and ears closed. HARES are born fully haired with eyes and ears open. All are vegetarians. (From Nowak, Walker's Mammals of the World, 5th ed, p539-41)
A phylum of metazoan invertebrates comprising the segmented worms, and including marine annelids (POLYCHAETA), freshwater annelids, earthworms (OLIGOCHAETA), and LEECHES. Only the leeches are of medical interest. (Dorland, 27th ed)
Proteins found in any species of bacterium.
Flagellate EUKARYOTES, found mainly in the oceans. They are characterized by the presence of transverse and longitudinal flagella which propel the organisms in a rotating manner through the water. Dinoflagellida were formerly members of the class Phytomastigophorea under the old five kingdom paradigm.
I'm afraid there seems to be a misunderstanding - "Africa" is not a medical term and does not have a medical definition. Africa is the world's second-largest and second-most populous continent, consisting of 54 countries with diverse cultures, peoples, languages, and landscapes. If you have any questions related to medical topics or definitions, I would be happy to help answer those for you!
A phenotypically recognizable genetic trait which can be used to identify a genetic locus, a linkage group, or a recombination event.
Differential and non-random reproduction of different genotypes, operating to alter the gene frequencies within a population.
The phylum of sponges which are sessile, suspension-feeding, multicellular animals that utilize flagellated cells called choanocytes to circulate water. Most are hermaphroditic. They are probably an early evolutionary side branch that gave rise to no other group of animals. Except for about 150 freshwater species, sponges are marine animals. They are a source of ALKALOIDS; STEROLS; and other complex molecules useful in medicine and biological research.
While there isn't a specific medical definition for "North America," I can provide a geographical definition that is often used in public health and medical contexts: North America is the third largest continent by area, encompassing 23 independent states, including the United States, Canada, and Mexico, which are home to diverse populations, cultures, and ecosystems, and share common health-related challenges such as obesity, diabetes, and healthcare access disparities.
A stochastic process such that the conditional probability distribution for a state at any future instant, given the present state, is unaffected by any additional knowledge of the past history of the system.
Sequences of DNA in the genes that are located between the EXONS. They are transcribed along with the exons but are removed from the primary gene transcript by RNA SPLICING to leave mature RNA. Some introns code for separate genes.
The branch of science concerned with the interrelationship of organisms and their ENVIRONMENT, especially as manifested by natural cycles and rhythms, community development and structure, interactions between different kinds of organisms, geographic distributions, and population alterations. (Webster's, 3d ed)
A monophyletic group of green plants that includes all land plants (EMBRYOPHYTA) and all green algae (CHLOROPHYTA and STREPTOPHYTA).
Any of numerous winged hymenopterous insects of social as well as solitary habits and having formidable stings.
The general name for NORTH AMERICA; CENTRAL AMERICA; and SOUTH AMERICA unspecified or combined.
An infraorder of New World monkeys, comprised of the families AOTIDAE; ATELIDAE; CEBIDAE; and PITHECIIDAE. They are found exclusively in the Americas.
Deoxyribonucleic acid that makes up the genetic material of protozoa.
A technique of operations research for solving certain kinds of problems involving many variables where a best value or set of best values is to be found. It is most likely to be feasible when the quantity to be optimized, sometimes called the objective function, can be stated as a mathematical expression in terms of the various activities within the system, and when this expression is simply proportional to the measure of the activities, i.e., is linear, and when all the restrictions are also linear. It is different from computer programming, although problems using linear programming techniques may be programmed on a computer.
Any of numerous burrowing mammals found in temperate regions and having minute eyes often covered with skin.
INSECTS of the order Coleoptera, containing over 350,000 species in 150 families. They possess hard bodies and their mouthparts are adapted for chewing.
The genetic complement of CHLOROPLASTS as represented in their DNA.
A plant family of the order ZINGIBERALES, subclass Zingiberidae, class Liliopsida best known for banana (MUSA). The slender false trunk, formed by leaf sheaths of the spirally arranged leaves, may rise to 15 meters (50 feet). There is a crown of large leaves at the top.
Mammals of the families Delphinidae (ocean dolphins), Iniidae, Lipotidae, Pontoporiidae, and Platanistidae (all river dolphins). Among the most well-known species are the BOTTLE-NOSED DOLPHIN and the KILLER WHALE (a dolphin). The common name dolphin is applied to small cetaceans having a beaklike snout and a slender, streamlined body, whereas PORPOISES are small cetaceans with a blunt snout and rather stocky body. (From Walker's Mammals of the World, 5th ed, pp978-9)
The relationship between an invertebrate and another organism (the host), one of which lives at the expense of the other. Traditionally excluded from definition of parasites are pathogenic BACTERIA; FUNGI; VIRUSES; and PLANTS; though they may live parasitically.
Within a eukaryotic cell, a membrane-limited body which contains chromosomes and one or more nucleoli (CELL NUCLEOLUS). The nuclear membrane consists of a double unit-type membrane which is perforated by a number of pores; the outermost membrane is continuous with the ENDOPLASMIC RETICULUM. A cell may contain more than one nucleus. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)

A novel genetic screen for snRNP assembly factors in yeast identifies a conserved protein, Sad1p, also required for pre-mRNA splicing. (1/52004)

The assembly pathway of spliceosomal snRNPs in yeast is poorly understood. We devised a screen to identify mutations blocking the assembly of newly synthesized U4 snRNA into a functional snRNP. Fifteen mutant strains failing either to accumulate the newly synthesized U4 snRNA or to assemble a U4/U6 particle were identified and categorized into 13 complementation groups. Thirteen previously identified splicing-defective prp mutants were also assayed for U4 snRNP assembly defects. Mutations in the U4/U6 snRNP components Prp3p, Prp4p, and Prp24p led to disassembly of the U4/U6 snRNP particle and degradation of the U6 snRNA, while prp17-1 and prp19-1 strains accumulated free U4 and U6 snRNA. A detailed analysis of a newly identified mutant, the sad1-1 mutant, is presented. In addition to having the snRNP assembly defect, the sad1-1 mutant is severely impaired in splicing at the restrictive temperature: the RP29 pre-mRNA strongly accumulates and splicing-dependent production of beta-galactosidase from reporter constructs is abolished, while extracts prepared from sad1-1 strains fail to splice pre-mRNA substrates in vitro. The sad1-1 mutant is the only splicing-defective mutant analyzed whose mutation preferentially affects assembly of newly synthesized U4 snRNA into the U4/U6 particle. SAD1 encodes a novel protein of 52 kDa which is essential for cell viability. Sad1p localizes to the nucleus and is not stably associated with any of the U snRNAs. Sad1p contains a putative zinc finger and is phylogenetically highly conserved, with homologues identified in human, Caenorhabditis elegans, Arabidospis, and Drosophila.  (+info)

The nuclear receptor superfamily has undergone extensive proliferation and diversification in nematodes. (2/52004)

The nuclear receptor (NR) superfamily is the most abundant class of transcriptional regulators encoded in the Caenorhabditis elegans genome, with >200 predicted genes revealed by the screens and analysis of genomic sequence reported here. This is the largest number of NR genes yet described from a single species, although our analysis of available genomic sequence from the related nematode Caenorhabditis briggsae indicates that it also has a large number. Existing data demonstrate expression for 25% of the C. elegans NR sequences. Sequence conservation and statistical arguments suggest that the majority represent functional genes. An analysis of these genes based on the DNA-binding domain motif revealed that several NR classes conserved in both vertebrates and insects are also represented among the nematode genes, consistent with the existence of ancient NR classes shared among most, and perhaps all, metazoans. Most of the nematode NR sequences, however, are distinct from those currently known in other phyla, and reveal a previously unobserved diversity within the NR superfamily. In C. elegans, extensive proliferation and diversification of NR sequences have occurred on chromosome V, accounting for > 50% of the predicted NR genes.  (+info)

Isolation of zebrafish gdf7 and comparative genetic mapping of genes belonging to the growth/differentiation factor 5, 6, 7 subgroup of the TGF-beta superfamily. (3/52004)

The Growth/differentiation factor (Gdf) 5, 6, 7 genes form a closely related subgroup belonging to the TGF-beta superfamily. In zebrafish, there are three genes that belong to the Gdf5, 6, 7 subgroup that have been named radar, dynamo, and contact. The genes radar and dynamo both encode proteins most similar to mouse GDF6. The orthologous identity of these genes on the basis of amino acid similarities has not been clear. We have identified gdf7, a fourth zebrafish gene belonging to the Gdf5, 6, 7 subgroup. To assign correct orthologies and to investigate the evolutionary relationships of the human, mouse, and zebrafish Gdf5, 6, 7 subgroup, we have compared genetic map positions of the zebrafish and mammalian genes. We have mapped zebrafish gdf7 to linkage group (LG) 17, contact to LG9, GDF6 to human chromosome (Hsa) 8 and GDF7 to Hsa2p. The radar and dynamo genes have been localized previously to LG16 and LG19, respectively. A comparison of syntenies shared among human, mouse, and zebrafish genomes indicates that gdf7 is the ortholog of mammalian GDF7/Gdf7. LG16 shares syntenic relationships with mouse chromosome (Mmu) 4, including Gdf6. Portions of LG16 and LG19 appear to be duplicate chromosomes, thus suggesting that radar and dynamo are both orthologs of Gdf6. Finally, the mapping data is consistent with contact being the zebrafish ortholog of mammalian GDF5/Gdf5.  (+info)

Novel endotheliotropic herpesviruses fatal for Asian and African elephants. (4/52004)

A highly fatal hemorrhagic disease has been identified in 10 young Asian and African elephants at North American zoos. In the affected animals there was ultrastructural evidence for herpesvirus-like particles in endothelial cells of the heart, liver, and tongue. Consensus primer polymerase chain reaction combined with sequencing yielded molecular evidence that confirmed the presence of two novel but related herpesviruses associated with the disease, one in Asian elephants and another in African elephants. Otherwise healthy African elephants with external herpetic lesions yielded herpesvirus sequences identical to that found in Asian elephants with endothelial disease. This finding suggests that the Asian elephant deaths were caused by cross-species infection with a herpesvirus that is naturally latent in, but normally not lethal to, African elephants. A reciprocal relationship may exist for the African elephant disease.  (+info)

Evolutionary relationships of pathogenic clones of Vibrio cholerae by sequence analysis of four housekeeping genes. (5/52004)

Studies of the Vibrio cholerae population, using molecular typing techniques, have shown the existence of several pathogenic clones, mainly sixth-pandemic, seventh-pandemic, and U.S. Gulf Coast clones. However, the relationship of the pathogenic clones to environmental V. cholerae isolates remains unclear. A previous study to determine the phylogeny of V. cholerae by sequencing the asd (aspartate semialdehyde dehydrogenase) gene of V. cholerae showed that the sixth-pandemic, seventh-pandemic, and U.S. Gulf Coast clones had very different asd sequences which fell into separate lineages in the V. cholerae population. As gene trees drawn from a single gene may not reflect the true topology of the population, we sequenced the mdh (malate dehydrogenase) and hlyA (hemolysin A) genes from representatives of environmental and clinical isolates of V. cholerae and found that the mdh and hlyA sequences from the three pathogenic clones were identical, except for the previously reported 11-bp deletion in hlyA in the sixth-pandemic clone. Identical sequences were obtained, despite average nucleotide differences in the mdh and hlyA genes of 1.52 and 3.25%, respectively, among all the isolates, suggesting that the three pathogenic clones are closely related. To extend these observations, segments of the recA and dnaE genes were sequenced from a selection of the pathogenic isolates, where the sequences were either identical or substantially different between the clones. The results show that the three pathogenic clones are very closely related and that there has been a high level of recombination in their evolution.  (+info)

Three receptor genes for plasminogen related growth factors in the genome of the puffer fish Fugu rubripes. (6/52004)

Plasminogen related growth factors (PRGFs) and their receptors play major roles in embryogenesis, tissue regeneration and neoplasia. In order to investigate the complexity and evolution of the PRGF receptor family we have cloned and sequenced three receptors for PRGFs in the teleost fish Fugu rubripes, a model vertebrate with a compact genome. One of the receptor genes isolated encodes the orthologue of mammalian MET, whilst the other two may represent Fugu rubripes orthologues of RON and SEA. This is the first time three PRGF receptors have been identified in a single species.  (+info)

Cloning, molecular analysis and differential cell localisation of the p36 RACK analogue antigen from the parasite protozoon Crithidia fasciculata. (7/52004)

The family of the RACK molecules (receptors for activated C kinases) are present in all the species studied so far. In the genus Leishmania, these molecules also induce a strong immune reaction against the infection. We have cloned and characterised the gene that encodes the RACK analogue from the parasite trypanosomatid Crithidia fasciculata (CACK). The molecule seems to be encoded by two genes. The sequence analysis of the cloned open reading frame indicates the existence of a high degree of conservation not only with other members of the Trypanosomatidae but also with mammalians. The study of the protein kinase C phosphorylation sites shows the presence of three of them, shared with the mammalian species, additional to those present in the other protozoa suggesting a certain phylogenetic distance between the protozoon Crithidia fasciculata and the rest of the Trypanosomatidae. The CACK-encoded polypeptide shows an additional sequence of four amino acids at the carboxy-terminal end, which produces a different folding of the fragment with the presence of an alpha-helix instead of the beta-sheet usual in all the other species studied. A similar result is elicited at the amino-terminal end by the change of three amino acid residues. The immunolocalisation experiments show that the CACK displays a pattern with a distribution mainly at the plasma membrane, different from that of the related Leishmania species used as control, that displays a distribution close to the nucleus. Altogether, the data suggest that the existence of the structural differences found may have functional consequences.  (+info)

Rhodanobacter lindaniclasticus gen. nov., sp. nov., a lindane-degrading bacterium. (8/52004)

Lindane-degrading activity under aerobic conditions has been observed in two bacterial strains: UT26, phenotypically identified as Sphingomonas paucimobilis, and a new single unidentified isolate named RP5557T. The rrs (16S rDNA) sequences for both strains and the phenotypic characteristics for the unidentified isolate RP5557T were determined. RP5557T does not have high identity (less than 90% in all cases) with any sequence in the GenBank or RDP databases. A phylogenetic analysis based on rrs sequences indicated that RP5557T belongs to the gamma-Proteobacteria in a coherent phylum that includes the genera Xanthomonas and Xylella (100% bootstrap), whereas UT26 is clearly separate from the Xanthomonas cluster. Based on the phylogenetic analyses and on the phenotypic characteristics, a new genus, Rhodanobacter, containing a single species, Rhodanobacter lindaniclasticus, is proposed for strain RP5557T (= LMG 18385T), which becomes the type strain.  (+info)

Phylogeny is the evolutionary history and relationship among biological entities, such as species or genes, based on their shared characteristics. In other words, it refers to the branching pattern of evolution that shows how various organisms have descended from a common ancestor over time. Phylogenetic analysis involves constructing a tree-like diagram called a phylogenetic tree, which depicts the inferred evolutionary relationships among organisms or genes based on molecular sequence data or other types of characters. This information is crucial for understanding the diversity and distribution of life on Earth, as well as for studying the emergence and spread of diseases.

Molecular evolution is the process of change in the DNA sequence or protein structure over time, driven by mechanisms such as mutation, genetic drift, gene flow, and natural selection. It refers to the evolutionary study of changes in DNA, RNA, and proteins, and how these changes accumulate and lead to new species and diversity of life. Molecular evolution can be used to understand the history and relationships among different organisms, as well as the functional consequences of genetic changes.

DNA Sequence Analysis is the systematic determination of the order of nucleotides in a DNA molecule. It is a critical component of modern molecular biology, genetics, and genetic engineering. The process involves determining the exact order of the four nucleotide bases - adenine (A), guanine (G), cytosine (C), and thymine (T) - in a DNA molecule or fragment. This information is used in various applications such as identifying gene mutations, studying evolutionary relationships, developing molecular markers for breeding, and diagnosing genetic diseases.

The process of DNA Sequence Analysis typically involves several steps, including DNA extraction, PCR amplification (if necessary), purification, sequencing reaction, and electrophoresis. The resulting data is then analyzed using specialized software to determine the exact sequence of nucleotides.

In recent years, high-throughput DNA sequencing technologies have revolutionized the field of genomics, enabling the rapid and cost-effective sequencing of entire genomes. This has led to an explosion of genomic data and new insights into the genetic basis of many diseases and traits.

Biological evolution is the change in the genetic composition of populations of organisms over time, from one generation to the next. It is a process that results in descendants differing genetically from their ancestors. Biological evolution can be driven by several mechanisms, including natural selection, genetic drift, gene flow, and mutation. These processes can lead to changes in the frequency of alleles (variants of a gene) within populations, resulting in the development of new species and the extinction of others over long periods of time. Biological evolution provides a unifying explanation for the diversity of life on Earth and is supported by extensive evidence from many different fields of science, including genetics, paleontology, comparative anatomy, and biogeography.

"Likelihood functions" is a statistical concept that is used in medical research and other fields to estimate the probability of obtaining a given set of data, given a set of assumptions or parameters. In other words, it is a function that describes how likely it is to observe a particular outcome or result, based on a set of model parameters.

More formally, if we have a statistical model that depends on a set of parameters θ, and we observe some data x, then the likelihood function is defined as:

L(θ | x) = P(x | θ)

This means that the likelihood function describes the probability of observing the data x, given a particular value of the parameter vector θ. By convention, the likelihood function is often expressed as a function of the parameters, rather than the data, so we might instead write:

L(θ) = P(x | θ)

The likelihood function can be used to estimate the values of the model parameters that are most consistent with the observed data. This is typically done by finding the value of θ that maximizes the likelihood function, which is known as the maximum likelihood estimator (MLE). The MLE has many desirable statistical properties, including consistency, efficiency, and asymptotic normality.

In medical research, likelihood functions are often used in the context of Bayesian analysis, where they are combined with prior distributions over the model parameters to obtain posterior distributions that reflect both the observed data and prior knowledge or assumptions about the parameter values. This approach is particularly useful when there is uncertainty or ambiguity about the true value of the parameters, as it allows researchers to incorporate this uncertainty into their analyses in a principled way.

Molecular sequence data refers to the specific arrangement of molecules, most commonly nucleotides in DNA or RNA, or amino acids in proteins, that make up a biological macromolecule. This data is generated through laboratory techniques such as sequencing, and provides information about the exact order of the constituent molecules. This data is crucial in various fields of biology, including genetics, evolution, and molecular biology, allowing for comparisons between different organisms, identification of genetic variations, and studies of gene function and regulation.

Mitochondrial DNA (mtDNA) is the genetic material present in the mitochondria, which are specialized structures within cells that generate energy. Unlike nuclear DNA, which is present in the cell nucleus and inherited from both parents, mtDNA is inherited solely from the mother.

MtDNA is a circular molecule that contains 37 genes, including 13 genes that encode for proteins involved in oxidative phosphorylation, a process that generates energy in the form of ATP. The remaining genes encode for rRNAs and tRNAs, which are necessary for protein synthesis within the mitochondria.

Mutations in mtDNA can lead to a variety of genetic disorders, including mitochondrial diseases, which can affect any organ system in the body. These mutations can also be used in forensic science to identify individuals and establish biological relationships.

Species specificity is a term used in the field of biology, including medicine, to refer to the characteristic of a biological entity (such as a virus, bacterium, or other microorganism) that allows it to interact exclusively or preferentially with a particular species. This means that the biological entity has a strong affinity for, or is only able to infect, a specific host species.

For example, HIV is specifically adapted to infect human cells and does not typically infect other animal species. Similarly, some bacterial toxins are species-specific and can only affect certain types of animals or humans. This concept is important in understanding the transmission dynamics and host range of various pathogens, as well as in developing targeted therapies and vaccines.

In genetics, sequence alignment is the process of arranging two or more DNA, RNA, or protein sequences to identify regions of similarity or homology between them. This is often done using computational methods to compare the nucleotide or amino acid sequences and identify matching patterns, which can provide insight into evolutionary relationships, functional domains, or potential genetic disorders. The alignment process typically involves adjusting gaps and mismatches in the sequences to maximize the similarity between them, resulting in an aligned sequence that can be visually represented and analyzed.

Bayes' theorem, also known as Bayes' rule or Bayes' formula, is a fundamental principle in the field of statistics and probability theory. It describes how to update the probability of a hypothesis based on new evidence or data. The theorem is named after Reverend Thomas Bayes, who first formulated it in the 18th century.

In mathematical terms, Bayes' theorem states that the posterior probability of a hypothesis (H) given some observed evidence (E) is proportional to the product of the prior probability of the hypothesis (P(H)) and the likelihood of observing the evidence given the hypothesis (P(E|H)):

Posterior Probability = P(H|E) = [P(E|H) x P(H)] / P(E)

Where:

* P(H|E): The posterior probability of the hypothesis H after observing evidence E. This is the probability we want to calculate.
* P(E|H): The likelihood of observing evidence E given that the hypothesis H is true.
* P(H): The prior probability of the hypothesis H before observing any evidence.
* P(E): The marginal likelihood or probability of observing evidence E, regardless of whether the hypothesis H is true or not. This value can be calculated as the sum of the products of the likelihood and prior probability for all possible hypotheses: P(E) = Σ[P(E|Hi) x P(Hi)]

Bayes' theorem has many applications in various fields, including medicine, where it can be used to update the probability of a disease diagnosis based on test results or other clinical findings. It is also widely used in machine learning and artificial intelligence algorithms for probabilistic reasoning and decision making under uncertainty.

In medical terms, "fossils" do not have a specific or direct relevance to the field. However, in a broader scientific context, fossils are the remains or impressions of prehistoric organisms preserved in petrified form or as a mold or cast in rock. They offer valuable evidence about the Earth's history and the life forms that existed on it millions of years ago.

Paleopathology is a subfield of paleontology that deals with the study of diseases in fossils, which can provide insights into the evolution of diseases and human health over time.

The ribosomal spacer in DNA refers to the non-coding sequences of DNA that are located between the genes for ribosomal RNA (rRNA). These spacer regions are present in the DNA of organisms that have a nuclear genome, including humans and other animals, plants, and fungi.

In prokaryotic cells, such as bacteria, there are two ribosomal RNA genes, 16S and 23S, separated by a spacer region known as the intergenic spacer (IGS). In eukaryotic cells, there are multiple copies of ribosomal RNA genes arranged in clusters called nucleolar organizer regions (NORs), which are located on the short arms of several acrocentric chromosomes. Each cluster contains hundreds to thousands of copies of the 18S, 5.8S, and 28S rRNA genes, separated by non-transcribed spacer regions known as internal transcribed spacers (ITS) and external transcribed spacers (ETS).

The ribosomal spacer regions in DNA are often used as molecular markers for studying evolutionary relationships among organisms because they evolve more rapidly than the rRNA genes themselves. The sequences of these spacer regions can be compared among different species to infer their phylogenetic relationships and to estimate the time since they diverged from a common ancestor. Additionally, the length and composition of ribosomal spacers can vary between individuals within a species, making them useful for studying genetic diversity and population structure.

Ribosomal DNA (rDNA) refers to the specific regions of DNA in a cell that contain the genes for ribosomal RNA (rRNA). Ribosomes are complex structures composed of proteins and rRNA, which play a crucial role in protein synthesis by translating messenger RNA (mRNA) into proteins.

In humans, there are four types of rRNA molecules: 18S, 5.8S, 28S, and 5S. These rRNAs are encoded by multiple copies of rDNA genes that are organized in clusters on specific chromosomes. In humans, the majority of rDNA genes are located on the short arms of acrocentric chromosomes 13, 14, 15, 21, and 22.

Each cluster of rDNA genes contains both transcribed and non-transcribed spacer regions. The transcribed regions contain the genes for the four types of rRNA, while the non-transcribed spacers contain regulatory elements that control the transcription of the rRNA genes.

The number of rDNA copies varies between species and even within individuals of the same species. The copy number can also change during development and in response to environmental factors. Variations in rDNA copy number have been associated with various diseases, including cancer and neurological disorders.

Genetic speciation is not a widely used term in the scientific literature, but it generally refers to the process by which new species arise due to genetic differences and reproductive isolation. This process can occur through various mechanisms such as mutation, gene flow, genetic drift, natural selection, or chromosomal changes that lead to the accumulation of genetic differences between populations. Over time, these genetic differences can result in the development of reproductive barriers that prevent interbreeding between the populations, leading to the formation of new species.

In other words, genetic speciation is a type of speciation that involves the evolution of genetic differences that ultimately lead to the formation of new species. It is an essential concept in the field of evolutionary biology and genetics, as it explains how biodiversity arises over time.

Genetic models are theoretical frameworks used in genetics to describe and explain the inheritance patterns and genetic architecture of traits, diseases, or phenomena. These models are based on mathematical equations and statistical methods that incorporate information about gene frequencies, modes of inheritance, and the effects of environmental factors. They can be used to predict the probability of certain genetic outcomes, to understand the genetic basis of complex traits, and to inform medical management and treatment decisions.

There are several types of genetic models, including:

1. Mendelian models: These models describe the inheritance patterns of simple genetic traits that follow Mendel's laws of segregation and independent assortment. Examples include autosomal dominant, autosomal recessive, and X-linked inheritance.
2. Complex trait models: These models describe the inheritance patterns of complex traits that are influenced by multiple genes and environmental factors. Examples include heart disease, diabetes, and cancer.
3. Population genetics models: These models describe the distribution and frequency of genetic variants within populations over time. They can be used to study evolutionary processes, such as natural selection and genetic drift.
4. Quantitative genetics models: These models describe the relationship between genetic variation and phenotypic variation in continuous traits, such as height or IQ. They can be used to estimate heritability and to identify quantitative trait loci (QTLs) that contribute to trait variation.
5. Statistical genetics models: These models use statistical methods to analyze genetic data and infer the presence of genetic associations or linkage. They can be used to identify genetic risk factors for diseases or traits.

Overall, genetic models are essential tools in genetics research and medical genetics, as they allow researchers to make predictions about genetic outcomes, test hypotheses about the genetic basis of traits and diseases, and develop strategies for prevention, diagnosis, and treatment.

18S rRNA (ribosomal RNA) is the smaller subunit of the eukaryotic ribosome, which is the cellular organelle responsible for protein synthesis. The "18S" refers to the sedimentation coefficient of this rRNA molecule, which is a measure of its rate of sedimentation in a centrifuge and is expressed in Svedberg units (S).

The 18S rRNA is a component of the 40S subunit of the ribosome, and it plays a crucial role in the decoding of messenger RNA (mRNA) during protein synthesis. Specifically, the 18S rRNA helps to form the structure of the ribosome and contains several conserved regions that are involved in binding to mRNA and guiding the movement of transfer RNAs (tRNAs) during translation.

The 18S rRNA is also a commonly used molecular marker for evolutionary studies, as its sequence is highly conserved across different species and can be used to infer phylogenetic relationships between organisms. Additionally, the analysis of 18S rRNA gene sequences has been widely used in various fields such as ecology, environmental science, and medicine to study biodiversity, biogeography, and infectious diseases.

Genetic variation refers to the differences in DNA sequences among individuals and populations. These variations can result from mutations, genetic recombination, or gene flow between populations. Genetic variation is essential for evolution by providing the raw material upon which natural selection acts. It can occur within a single gene, between different genes, or at larger scales, such as differences in the number of chromosomes or entire sets of chromosomes. The study of genetic variation is crucial in understanding the genetic basis of diseases and traits, as well as the evolutionary history and relationships among species.

Chloroplast DNA (cpDNA) refers to the genetic material present in the chloroplasts, which are organelles found in the cells of photosynthetic organisms such as plants, algae, and some bacteria. Chloroplasts are responsible for capturing sunlight energy and converting it into chemical energy through the process of photosynthesis.

Chloroplast DNA is circular and contains a small number of genes compared to the nuclear genome. It encodes for some of the essential components required for chloroplast function, including proteins involved in photosynthesis, transcription, and translation. The majority of chloroplast proteins are encoded by the nuclear genome and are imported into the chloroplast after being synthesized in the cytoplasm.

Chloroplast DNA is inherited maternally in most plants, meaning that it is passed down from the maternal parent to their offspring through the egg cell. This mode of inheritance has been used in plant breeding and genetic engineering to introduce desirable traits into crops.

Ribosomal RNA (rRNA) is a type of RNA that combines with proteins to form ribosomes, which are complex structures inside cells where protein synthesis occurs. The "16S" refers to the sedimentation coefficient of the rRNA molecule, which is a measure of its size and shape. In particular, 16S rRNA is a component of the smaller subunit of the prokaryotic ribosome (found in bacteria and archaea), and is often used as a molecular marker for identifying and classifying these organisms due to its relative stability and conservation among species. The sequence of 16S rRNA can be compared across different species to determine their evolutionary relationships and taxonomic positions.

Phylogeography is not a medical term, but rather a subfield of biogeography and phylogenetics that investigates the spatial distribution of genealogical lineages and the historical processes that have shaped them. It uses genetic data to infer the geographic origins, dispersal routes, and demographic history of organisms, including pathogens and vectors that can affect human health.

In medical and public health contexts, phylogeography is often used to study the spread of infectious diseases, such as HIV/AIDS, influenza, or tuberculosis, by analyzing the genetic diversity and geographic distribution of pathogen isolates. This information can help researchers understand how diseases emerge, evolve, and move across populations and landscapes, which can inform disease surveillance, control, and prevention strategies.

28S ribosomal RNA (rRNA) is a component of the large subunit of the eukaryotic ribosome, which is the site of protein synthesis in the cell. The ribosome is composed of two subunits, one large and one small, that come together around an mRNA molecule to translate it into a protein.

The 28S rRNA is a type of rRNA that is found in the large subunit of the eukaryotic ribosome, along with the 5S and 5.8S rRNAs. Together, these rRNAs make up the structural framework of the ribosome and play a crucial role in the process of translation.

The 28S rRNA is synthesized in the nucleolus as a precursor RNA (pre-rRNA) that undergoes several processing steps, including cleavage and modification, to produce the mature 28S rRNA molecule. The length of the 28S rRNA varies between species, but it is typically around 4700-5000 nucleotides long in humans.

Abnormalities in the structure or function of the 28S rRNA can lead to defects in protein synthesis and have been implicated in various diseases, including cancer and neurological disorders.

A mitochondrial genome refers to the genetic material present in the mitochondria, which are small organelles found in the cytoplasm of eukaryotic cells (cells with a true nucleus). The mitochondrial genome is typically circular and contains a relatively small number of genes compared to the nuclear genome.

Mitochondrial DNA (mtDNA) encodes essential components of the electron transport chain, which is vital for cellular respiration and energy production. MtDNA also contains genes that code for some mitochondrial tRNAs and rRNAs needed for protein synthesis within the mitochondria.

In humans, the mitochondrial genome is about 16.6 kilobases in length and consists of 37 genes: 2 ribosomal RNA (rRNA) genes, 22 transfer RNA (tRNA) genes, and 13 protein-coding genes. The mitochondrial genome is inherited maternally, as sperm contribute very few or no mitochondria during fertilization. Mutations in the mitochondrial genome can lead to various genetic disorders, often affecting tissues with high energy demands, such as muscle and nerve cells.

A base sequence in the context of molecular biology refers to the specific order of nucleotides in a DNA or RNA molecule. In DNA, these nucleotides are adenine (A), guanine (G), cytosine (C), and thymine (T). In RNA, uracil (U) takes the place of thymine. The base sequence contains genetic information that is transcribed into RNA and ultimately translated into proteins. It is the exact order of these bases that determines the genetic code and thus the function of the DNA or RNA molecule.

In the context of medicine, classification refers to the process of categorizing or organizing diseases, disorders, injuries, or other health conditions based on their characteristics, symptoms, causes, or other factors. This helps healthcare professionals to understand, diagnose, and treat various medical conditions more effectively.

There are several well-known classification systems in medicine, such as:

1. The International Classification of Diseases (ICD) - developed by the World Health Organization (WHO), it is used worldwide for mortality and morbidity statistics, reimbursement systems, and automated decision support in health care. This system includes codes for diseases, signs and symptoms, abnormal findings, social circumstances, and external causes of injury or diseases.
2. The Diagnostic and Statistical Manual of Mental Disorders (DSM) - published by the American Psychiatric Association, it provides a standardized classification system for mental health disorders to improve communication between mental health professionals, facilitate research, and guide treatment.
3. The International Classification of Functioning, Disability and Health (ICF) - developed by the WHO, this system focuses on an individual's functioning and disability rather than solely on their medical condition. It covers body functions and structures, activities, and participation, as well as environmental and personal factors that influence a person's life.
4. The TNM Classification of Malignant Tumors - created by the Union for International Cancer Control (UICC), it is used to describe the anatomical extent of cancer, including the size of the primary tumor (T), involvement of regional lymph nodes (N), and distant metastasis (M).

These classification systems help medical professionals communicate more effectively about patients' conditions, make informed treatment decisions, and track disease trends over time.

Horizontal gene transfer (HGT), also known as lateral gene transfer, is the movement of genetic material between organisms in a manner other than from parent to offspring (vertical gene transfer). In horizontal gene transfer, an organism can take up genetic material directly from its environment and incorporate it into its own genome. This process is common in bacteria and archaea, but has also been observed in eukaryotes including plants and animals.

Horizontal gene transfer can occur through several mechanisms, including:

1. Transformation: the uptake of free DNA from the environment by a cell.
2. Transduction: the transfer of genetic material between cells by a virus (bacteriophage).
3. Conjugation: the direct transfer of genetic material between two cells in physical contact, often facilitated by a conjugative plasmid or other mobile genetic element.

Horizontal gene transfer can play an important role in the evolution and adaptation of organisms, allowing them to acquire new traits and functions rapidly. It is also of concern in the context of genetically modified organisms (GMOs) and antibiotic resistance, as it can facilitate the spread of genes that confer resistance or other undesirable traits.

Mammals are a group of warm-blooded vertebrates constituting the class Mammalia, characterized by the presence of mammary glands (which produce milk to feed their young), hair or fur, three middle ear bones, and a neocortex region in their brain. They are found in a diverse range of habitats and come in various sizes, from tiny shrews to large whales. Examples of mammals include humans, apes, monkeys, dogs, cats, bats, mice, raccoons, seals, dolphins, horses, and elephants.

Angiosperms, also known as flowering plants, are a group of plants that produce seeds enclosed within an ovary. The term "angiosperm" comes from the Greek words "angeion," meaning "case" or "capsule," and "sperma," meaning "seed." This group includes the majority of plant species, with over 300,000 known species.

Angiosperms are characterized by their reproductive structures, which consist of flowers. The flower contains male and female reproductive organs, including stamens (which produce pollen) and carpels (which contain the ovules). After fertilization, the ovule develops into a seed, while the ovary matures into a fruit, which provides protection and nutrition for the developing embryo.

Angiosperms are further divided into two main groups: monocots and eudicots. Monocots have one cotyledon or embryonic leaf, while eudicots have two. Examples of monocots include grasses, lilies, and orchids, while examples of eudicots include roses, sunflowers, and legumes.

Angiosperms are ecologically and economically important, providing food, shelter, and other resources for many organisms, including humans. They have evolved a wide range of adaptations to different environments, from the desert to the ocean floor, making them one of the most diverse and successful groups of plants on Earth.

Mitochondrial genes are a type of gene that is located in the DNA (deoxyribonucleic acid) found in the mitochondria, which are small organelles present in the cytoplasm of eukaryotic cells (cells with a true nucleus). Mitochondria are responsible for generating energy for the cell through a process called oxidative phosphorylation.

The human mitochondrial genome is a circular DNA molecule that contains 37 genes, including 13 genes that encode for proteins involved in oxidative phosphorylation, 22 genes that encode for transfer RNAs (tRNAs), and 2 genes that encode for ribosomal RNAs (rRNAs). Mutations in mitochondrial genes can lead to a variety of inherited mitochondrial disorders, which can affect any organ system in the body and can present at any age.

Mitochondrial DNA is maternally inherited, meaning that it is passed down from the mother to her offspring through the egg cell. This is because during fertilization, only the sperm's nucleus enters the egg, while the mitochondria remain outside. As a result, all of an individual's mitochondrial DNA comes from their mother.

I'm sorry for any confusion, but "geography" is not a term that has a medical definition. Geography is a field of study that deals with the location and distribution of physical and cultural features on Earth's surface, as well as how humans interact with and affect those features. It is not a concept that is typically used in a medical context. If you have any questions related to medicine or healthcare, I would be happy to try to help answer them for you!

Gymnosperms are a group of seed-producing plants that include conifers, cycads, Ginkgo, and gnetophytes. The name "gymnosperm" comes from the Greek words "gymnos," meaning naked, and "sperma," meaning seed. This refers to the fact that the seeds of gymnosperms are not enclosed within an ovary or fruit, but are exposed on the surface of modified leaves called cones or strobili.

Gymnosperms are vascular plants, which means they have specialized tissues for transporting water and nutrients throughout the plant. They are also heterosporous, meaning that they produce two types of spores: male microspores and female megaspores. The microspores develop into male gametophytes, which produce sperm cells, while the megaspores develop into female gametophytes, which produce egg cells.

Gymnosperms are an important group of plants that have been around for millions of years. They are adapted to a wide range of environments, from temperate forests to deserts and high mountain ranges. Many gymnosperms are evergreen, with needle-like or scale-like leaves that are able to resist drought and cold temperatures.

Conifers, which include trees such as pines, firs, spruces, and redwoods, are the most diverse and widespread group of gymnosperms. They are characterized by their woody cones and needle-shaped leaves. Cycads are another group of gymnosperms that are found in tropical and subtropical regions. They have large, stiff leaves and produce large seeds that are enclosed in a fleshy covering. Ginkgo is a unique gymnosperm that has been around for over 200 million years. It is a deciduous tree with fan-shaped leaves and large, naked seeds.

Gnetophytes are a small group of gymnosperms that include the ephedra, welwitschia, and gnetum. They have unique features such as vessels in their wood and motile sperm cells, which are not found in other gymnosperms.

Overall, gymnosperms are an important group of plants that have adapted to a wide range of environments and play a crucial role in many ecosystems.

I'm sorry for any confusion, but "Invertebrates" is not a medical term. It is a term used in biology to describe a vast group of animals that do not have a vertebral column or spinal cord. This includes creatures such as insects, worms, starfish, and shellfish, among many others. They are classified as invertebrates because they lack a backbone, which is a characteristic of vertebrates, or animals that include humans and other mammals, birds, reptiles, amphibians, and fish.

DNA, or deoxyribonucleic acid, is the genetic material present in the cells of all living organisms, including plants. In plants, DNA is located in the nucleus of a cell, as well as in chloroplasts and mitochondria. Plant DNA contains the instructions for the development, growth, and function of the plant, and is passed down from one generation to the next through the process of reproduction.

The structure of DNA is a double helix, formed by two strands of nucleotides that are linked together by hydrogen bonds. Each nucleotide contains a sugar molecule (deoxyribose), a phosphate group, and a nitrogenous base. There are four types of nitrogenous bases in DNA: adenine (A), guanine (G), cytosine (C), and thymine (T). Adenine pairs with thymine, and guanine pairs with cytosine, forming the rungs of the ladder that make up the double helix.

The genetic information in DNA is encoded in the sequence of these nitrogenous bases. Large sequences of bases form genes, which provide the instructions for the production of proteins. The process of gene expression involves transcribing the DNA sequence into a complementary RNA molecule, which is then translated into a protein.

Plant DNA is similar to animal DNA in many ways, but there are also some differences. For example, plant DNA contains a higher proportion of repetitive sequences and transposable elements, which are mobile genetic elements that can move around the genome and cause mutations. Additionally, plant cells have cell walls and chloroplasts, which are not present in animal cells, and these structures contain their own DNA.

Plastids are membrane-bound organelles found in the cells of plants and algae. They are responsible for various cellular functions, including photosynthesis, storage of starch, lipids, and proteins, and the production of pigments that give plants their color. The most common types of plastids are chloroplasts (which contain chlorophyll and are involved in photosynthesis), chromoplasts (which contain pigments such as carotenoids and are responsible for the yellow, orange, and red colors of fruits and flowers), and leucoplasts (which do not contain pigments and serve mainly as storage organelles). Plastids have their own DNA and can replicate themselves within the cell.

Arthropods are a phylum of animals characterized by the presence of a segmented body, a pair of jointed appendages on each segment, and a tough exoskeleton made of chitin. This phylum includes insects, arachnids (spiders, scorpions, mites), crustaceans (crabs, lobsters, shrimp), and myriapods (centipedes, millipedes). They are the largest group of animals on Earth, making up more than 80% of all described species. Arthropods can be found in nearly every habitat, from the deep sea to mountaintops, and play important roles in ecosystems as decomposers, pollinators, and predators.

Ribosomal RNA (rRNA) is a type of RNA molecule that is a key component of ribosomes, which are the cellular structures where protein synthesis occurs in cells. In ribosomes, rRNA plays a crucial role in the process of translation, where genetic information from messenger RNA (mRNA) is translated into proteins.

Ribosomal RNA is synthesized in the nucleus and then transported to the cytoplasm, where it assembles with ribosomal proteins to form ribosomes. Within the ribosome, rRNA provides a structural framework for the assembly of the ribosome and also plays an active role in catalyzing the formation of peptide bonds between amino acids during protein synthesis.

There are several different types of rRNA molecules, including 5S, 5.8S, 18S, and 28S rRNA, which vary in size and function. These rRNA molecules are highly conserved across different species, indicating their essential role in protein synthesis and cellular function.

In a medical or scientific context, "Primates" is a biological order that includes various species of mammals, such as humans, apes, monkeys, and prosimians (like lemurs and lorises). This group is characterized by several distinct features, including:

1. A forward-facing eye position, which provides stereoscopic vision and depth perception.
2. Nails instead of claws on most digits, except for the big toe in some species.
3. A rotating shoulder joint that allows for a wide range of motion in the arms.
4. A complex brain with a well-developed cortex, which is associated with higher cognitive functions like problem-solving and learning.
5. Social structures and behaviors, such as living in groups and exhibiting various forms of communication.

Understanding primates is essential for medical and biological research since many human traits, diseases, and behaviors have their origins within this group.

A multigene family is a group of genetically related genes that share a common ancestry and have similar sequences or structures. These genes are arranged in clusters on a chromosome and often encode proteins with similar functions. They can arise through various mechanisms, including gene duplication, recombination, and transposition. Multigene families play crucial roles in many biological processes, such as development, immunity, and metabolism. Examples of multigene families include the globin genes involved in oxygen transport, the immune system's major histocompatibility complex (MHC) genes, and the cytochrome P450 genes associated with drug metabolism.

Biodiversity is the variety of different species of plants, animals, and microorganisms that live in an ecosystem. It also includes the variety of genes within a species and the variety of ecosystems (such as forests, grasslands, deserts, and oceans) that exist in a region or on Earth as a whole. Biodiversity is important for maintaining the health and balance of ecosystems, providing resources and services such as food, clean water, and pollination, and contributing to the discovery of new medicines and other useful products. The loss of biodiversity can have negative impacts on the functioning of ecosystems and the services they provide, and can threaten the survival of species and the livelihoods of people who depend on them.

Gene duplication, in the context of genetics and genomics, refers to an event where a segment of DNA that contains a gene is copied, resulting in two identical copies of that gene. This can occur through various mechanisms such as unequal crossing over during meiosis, retrotransposition, or whole genome duplication. The duplicate genes are then passed on to the next generation.

Gene duplications can have several consequences. Often, one copy may continue to function normally while the other is free to mutate without affecting the organism's survival, potentially leading to new functions (neofunctionalization) or subfunctionalization where each copy takes on some of the original gene's roles.

Gene duplication plays a significant role in evolution by providing raw material for the creation of novel genes and genetic diversity. However, it can also lead to various genetic disorders if multiple copies of a gene become dysfunctional or if there are too many copies, leading to an overdose effect.

Eukaryota is a domain that consists of organisms whose cells have a true nucleus and complex organelles. This domain includes animals, plants, fungi, and protists. The term "eukaryote" comes from the Greek words "eu," meaning true or good, and "karyon," meaning nut or kernel. In eukaryotic cells, the genetic material is housed within a membrane-bound nucleus, and the DNA is organized into chromosomes. This is in contrast to prokaryotic cells, which do not have a true nucleus and have their genetic material dispersed throughout the cytoplasm.

Eukaryotic cells are generally larger and more complex than prokaryotic cells. They have many different organelles, including mitochondria, chloroplasts, endoplasmic reticulum, and Golgi apparatus, that perform specific functions to support the cell's metabolism and survival. Eukaryotic cells also have a cytoskeleton made up of microtubules, actin filaments, and intermediate filaments, which provide structure and shape to the cell and allow for movement of organelles and other cellular components.

Eukaryotes are diverse and can be found in many different environments, ranging from single-celled organisms that live in water or soil to multicellular organisms that live on land or in aquatic habitats. Some eukaryotes are unicellular, meaning they consist of a single cell, while others are multicellular, meaning they consist of many cells that work together to form tissues and organs.

In summary, Eukaryota is a domain of organisms whose cells have a true nucleus and complex organelles. This domain includes animals, plants, fungi, and protists, and the eukaryotic cells are generally larger and more complex than prokaryotic cells.

A genome is the complete set of genetic material (DNA, or in some viruses, RNA) present in a single cell of an organism. It includes all of the genes, both coding and noncoding, as well as other regulatory elements that together determine the unique characteristics of that organism. The human genome, for example, contains approximately 3 billion base pairs and about 20,000-25,000 protein-coding genes.

The term "genome" was first coined by Hans Winkler in 1920, derived from the word "gene" and the suffix "-ome," which refers to a complete set of something. The study of genomes is known as genomics.

Understanding the genome can provide valuable insights into the genetic basis of diseases, evolution, and other biological processes. With advancements in sequencing technologies, it has become possible to determine the entire genomic sequence of many organisms, including humans, and use this information for various applications such as personalized medicine, gene therapy, and biotechnology.

A bacterial genome is the complete set of genetic material, including both DNA and RNA, found within a single bacterium. It contains all the hereditary information necessary for the bacterium to grow, reproduce, and survive in its environment. The bacterial genome typically includes circular chromosomes, as well as plasmids, which are smaller, circular DNA molecules that can carry additional genes. These genes encode various functional elements such as enzymes, structural proteins, and regulatory sequences that determine the bacterium's characteristics and behavior.

Bacterial genomes vary widely in size, ranging from around 130 kilobases (kb) in Mycoplasma genitalium to over 14 megabases (Mb) in Sorangium cellulosum. The complete sequencing and analysis of bacterial genomes have provided valuable insights into the biology, evolution, and pathogenicity of bacteria, enabling researchers to better understand their roles in various diseases and potential applications in biotechnology.

I am not aware of a medical definition for the term "birds." Birds are a group of warm-blooded vertebrates constituting the class Aves, characterized by feathers, toothless beaked jaws, the laying of hard-shelled eggs, and lightweight but strong skeletons. Some birds, such as pigeons and chickens, have been used in medical research, but the term "birds" itself does not have a specific medical definition.

A group of chordate animals (Phylum Chordata) that have a vertebral column, or backbone, made up of individual vertebrae. This group includes mammals, birds, reptiles, amphibians, and fish. Vertebrates are characterized by the presence of a notochord, which is a flexible, rod-like structure that runs along the length of the body during development; a dorsal hollow nerve cord; and pharyngeal gill slits at some stage in their development. The vertebral column provides support and protection for the spinal cord and allows for the development of complex movements and behaviors.

rRNA (ribosomal RNA) is not a type of gene itself, but rather a crucial component that is transcribed from genes known as ribosomal DNA (rDNA). In cells, rRNA plays an essential role in protein synthesis by assembling with ribosomal proteins to form ribosomes. Ribosomes are complex structures where the translation of mRNA into proteins occurs. There are multiple types of rRNA molecules, including 5S, 5.8S, 18S, and 28S rRNAs in eukaryotic cells, each with specific functions during protein synthesis.

In summary, 'Genes, rRNA' would refer to the genetic regions (genes) that code for ribosomal RNA molecules, which are vital components of the protein synthesis machinery within cells.

"Extinction, Biological" refers to the state or process of a species or taxonomic group becoming extinct, meaning that there are no surviving members remaining alive anywhere in the world. This can occur due to various factors such as environmental changes, competition with other species, overexploitation by humans, or a combination of these and other elements. It is an important concept in the field of biology and conservation, as the extinction of a species can have significant impacts on ecosystems and biodiversity.

An amino acid sequence is the specific order of amino acids in a protein or peptide molecule, formed by the linking of the amino group (-NH2) of one amino acid to the carboxyl group (-COOH) of another amino acid through a peptide bond. The sequence is determined by the genetic code and is unique to each type of protein or peptide. It plays a crucial role in determining the three-dimensional structure and function of proteins.

Computational biology is a branch of biology that uses mathematical and computational methods to study biological data, models, and processes. It involves the development and application of algorithms, statistical models, and computational approaches to analyze and interpret large-scale molecular and phenotypic data from genomics, transcriptomics, proteomics, metabolomics, and other high-throughput technologies. The goal is to gain insights into biological systems and processes, develop predictive models, and inform experimental design and hypothesis testing in the life sciences. Computational biology encompasses a wide range of disciplines, including bioinformatics, systems biology, computational genomics, network biology, and mathematical modeling of biological systems.

Sequence homology in nucleic acids refers to the similarity or identity between the nucleotide sequences of two or more DNA or RNA molecules. It is often used as a measure of biological relationship between genes, organisms, or populations. High sequence homology suggests a recent common ancestry or functional constraint, while low sequence homology may indicate a more distant relationship or different functions.

Nucleic acid sequence homology can be determined by various methods such as pairwise alignment, multiple sequence alignment, and statistical analysis. The degree of homology is typically expressed as a percentage of identical or similar nucleotides in a given window of comparison.

It's important to note that the interpretation of sequence homology depends on the biological context and the evolutionary distance between the sequences compared. Therefore, functional and experimental validation is often necessary to confirm the significance of sequence homology.

In the context of medicine and biology, symbiosis is a type of close and long-term biological interaction between two different biological organisms. Generally, one organism, called the symbiont, lives inside or on another organism, called the host. This interaction can be mutually beneficial (mutualistic), harmful to the host organism (parasitic), or have no effect on either organism (commensal).

Examples of mutualistic symbiotic relationships in humans include the bacteria that live in our gut and help us digest food, as well as the algae that live inside corals and provide them with nutrients. Parasitic symbioses, on the other hand, involve organisms like viruses or parasitic worms that live inside a host and cause harm to it.

It's worth noting that while the term "symbiosis" is often used in popular culture to refer to any close relationship between two organisms, in scientific contexts it has a more specific meaning related to long-term biological interactions.

I apologize for any confusion, but "plants" is not a term that has a medical definition. The term "plants" refers to a large and diverse group of organisms that obtain their energy through photosynthesis, which is the process of converting sunlight into chemical energy. Plants are typically characterized by having cells with cell walls containing cellulose, chloroplasts containing the pigment chlorophyll, and the ability to synthesize their own food through photosynthesis.

In a medical or biological context, you might be thinking of "plant-based" or "phytomedicine," which refer to the use of plants or plant extracts as a form of medicine or treatment. Phytomedicines have been used for thousands of years in many traditional systems of medicine, and some plant-derived compounds have been found to have therapeutic benefits in modern medicine as well. However, "plants" itself does not have a medical definition.

Cluster analysis is a statistical method used to group similar objects or data points together based on their characteristics or features. In medical and healthcare research, cluster analysis can be used to identify patterns or relationships within complex datasets, such as patient records or genetic information. This technique can help researchers to classify patients into distinct subgroups based on their symptoms, diagnoses, or other variables, which can inform more personalized treatment plans or public health interventions.

Cluster analysis involves several steps, including:

1. Data preparation: The researcher must first collect and clean the data, ensuring that it is complete and free from errors. This may involve removing outlier values or missing data points.
2. Distance measurement: Next, the researcher must determine how to measure the distance between each pair of data points. Common methods include Euclidean distance (the straight-line distance between two points) or Manhattan distance (the distance between two points along a grid).
3. Clustering algorithm: The researcher then applies a clustering algorithm, which groups similar data points together based on their distances from one another. Common algorithms include hierarchical clustering (which creates a tree-like structure of clusters) or k-means clustering (which assigns each data point to the nearest centroid).
4. Validation: Finally, the researcher must validate the results of the cluster analysis by evaluating the stability and robustness of the clusters. This may involve re-running the analysis with different distance measures or clustering algorithms, or comparing the results to external criteria.

Cluster analysis is a powerful tool for identifying patterns and relationships within complex datasets, but it requires careful consideration of the data preparation, distance measurement, and validation steps to ensure accurate and meaningful results.

Genomics is the scientific study of genes and their functions. It involves the sequencing and analysis of an organism's genome, which is its complete set of DNA, including all of its genes. Genomics also includes the study of how genes interact with each other and with the environment. This field of study can provide important insights into the genetic basis of diseases and can lead to the development of new diagnostic tools and treatments.

Ascomycota is a phylum in the kingdom Fungi, also known as sac fungi. This group includes both unicellular and multicellular organisms, such as yeasts, mold species, and morel mushrooms. Ascomycetes are characterized by their reproductive structures called ascus, which contain typically eight haploid spores produced sexually through a process called ascogony. Some members of this phylum have significant ecological and economic importance, as they can be decomposers, mutualistic symbionts, or plant pathogens causing various diseases. Examples include the baker's yeast Saccharomyces cerevisiae, ergot fungus Claviceps purpurea, and morel mushroom Morchella esculenta.

Anthocerotophyta is a division that includes hornworts, which are non-vascular land plants. These plants are characterized by the presence of specialized cells called mucilage cells and unique reproductive structures called anthoceros-type sporangia. The gametophyte generation is dominant in the life cycle of these plants, and they typically grow in damp, shaded habitats. Some common examples of hornworts include species in the genera Anthoceros, Notothylas, and Phaeoceros.

An algorithm is not a medical term, but rather a concept from computer science and mathematics. In the context of medicine, algorithms are often used to describe step-by-step procedures for diagnosing or managing medical conditions. These procedures typically involve a series of rules or decision points that help healthcare professionals make informed decisions about patient care.

For example, an algorithm for diagnosing a particular type of heart disease might involve taking a patient's medical history, performing a physical exam, ordering certain diagnostic tests, and interpreting the results in a specific way. By following this algorithm, healthcare professionals can ensure that they are using a consistent and evidence-based approach to making a diagnosis.

Algorithms can also be used to guide treatment decisions. For instance, an algorithm for managing diabetes might involve setting target blood sugar levels, recommending certain medications or lifestyle changes based on the patient's individual needs, and monitoring the patient's response to treatment over time.

Overall, algorithms are valuable tools in medicine because they help standardize clinical decision-making and ensure that patients receive high-quality care based on the latest scientific evidence.

Strepsirhini is a term used in primatology and physical anthropology to refer to a parvorder of primates that includes lemurs, lorises, and galagos (bushbabies). This group is characterized by several features, including a wet nose, a grooming claw on the second digit of the hind foot, and a toothcomb - a set of lower incisors and canines specialized for grooming.

The term Strepsirhini comes from the Greek words "streptos" meaning twisted and "rhinos" meaning nose, referring to the wet, rhinarium (naked, moist snout) found in these primates. This is one of the two major divisions within the infraorder Lemuriformes, the other being Haplorhini, which includes tarsiers, monkeys, apes, and humans.

Archaea are a domain of single-celled microorganisms that lack membrane-bound nuclei and other organelles. They are characterized by the unique structure of their cell walls, membranes, and ribosomes. Archaea were originally classified as bacteria, but they differ from bacteria in several key ways, including their genetic material and metabolic processes.

Archaea can be found in a wide range of environments, including some of the most extreme habitats on Earth, such as hot springs, deep-sea vents, and highly saline lakes. Some species of Archaea are able to survive in the absence of oxygen, while others require oxygen to live.

Archaea play important roles in global nutrient cycles, including the nitrogen cycle and the carbon cycle. They are also being studied for their potential role in industrial processes, such as the production of biofuels and the treatment of wastewater.

An "ecosystem" is not a term that has a specific medical definition, as it is a concept that is more commonly used in the fields of ecology and environmental science. However, I can provide you with the general ecological definition of an ecosystem:

An ecosystem is a community of living organisms interacting with each other and their non-living environment, including both biotic factors (plants, animals, microorganisms) and abiotic factors (climate, soil, water, and air). These interactions create a complex network of relationships that form the foundation of ecological processes, such as energy flow, nutrient cycling, and population dynamics.

While there is no direct medical definition for an ecosystem, understanding the principles of ecosystems can have important implications for human health. For example, healthy ecosystems can provide clean air and water, regulate climate, support food production, and offer opportunities for recreation and relaxation, all of which contribute to overall well-being. Conversely, degraded ecosystems can lead to increased exposure to environmental hazards, reduced access to natural resources, and heightened risks of infectious diseases. Therefore, maintaining the health and integrity of ecosystems is crucial for promoting human health and preventing disease.

Bacterial DNA refers to the genetic material found in bacteria. It is composed of a double-stranded helix containing four nucleotide bases - adenine (A), thymine (T), guanine (G), and cytosine (C) - that are linked together by phosphodiester bonds. The sequence of these bases in the DNA molecule carries the genetic information necessary for the growth, development, and reproduction of bacteria.

Bacterial DNA is circular in most bacterial species, although some have linear chromosomes. In addition to the main chromosome, many bacteria also contain small circular pieces of DNA called plasmids that can carry additional genes and provide resistance to antibiotics or other environmental stressors.

Unlike eukaryotic cells, which have their DNA enclosed within a nucleus, bacterial DNA is present in the cytoplasm of the cell, where it is in direct contact with the cell's metabolic machinery. This allows for rapid gene expression and regulation in response to changing environmental conditions.

Bacteria are single-celled microorganisms that are among the earliest known life forms on Earth. They are typically characterized as having a cell wall and no membrane-bound organelles. The majority of bacteria have a prokaryotic organization, meaning they lack a nucleus and other membrane-bound organelles.

Bacteria exist in diverse environments and can be found in every habitat on Earth, including soil, water, and the bodies of plants and animals. Some bacteria are beneficial to their hosts, while others can cause disease. Beneficial bacteria play important roles in processes such as digestion, nitrogen fixation, and biogeochemical cycling.

Bacteria reproduce asexually through binary fission or budding, and some species can also exchange genetic material through conjugation. They have a wide range of metabolic capabilities, with many using organic compounds as their source of energy, while others are capable of photosynthesis or chemosynthesis.

Bacteria are highly adaptable and can evolve rapidly in response to environmental changes. This has led to the development of antibiotic resistance in some species, which poses a significant public health challenge. Understanding the biology and behavior of bacteria is essential for developing strategies to prevent and treat bacterial infections and diseases.

Peptide Elongation Factor 1 (PEF1) is not a commonly used medical term, but it is a term used in biochemistry and molecular biology. Here's the definition:

Peptide Elongation Factor 1 (also known as EF-Tu in prokaryotes or EFT1A/EFT1B in eukaryotes) is a protein involved in the elongation phase of protein synthesis, specifically during translation. It plays a crucial role in delivering aminoacyl-tRNAs to the ribosome, enabling the addition of new amino acids to the growing polypeptide chain.

In eukaryotic cells, EF1A and EF1B (also known as EF-Ts) form a complex that helps facilitate the binding of aminoacyl-tRNAs to the ribosome. In prokaryotic cells, EF-Tu forms a complex with GTP and aminoacyl-tRNA, which then binds to the ribosome. Once bound, GTP is hydrolyzed to GDP, causing a conformational change that releases the aminoacyl-tRNA into the acceptor site of the ribosome, allowing for peptide bond formation. The EF-Tu/GDP complex then dissociates from the ribosome and is recycled by another protein called EF-G (EF-G in prokaryotes or EFL1 in eukaryotes).

Therefore, Peptide Elongation Factor 1 plays a critical role in ensuring that the correct amino acids are added to the growing peptide chain during protein synthesis.

Platyhelminths, also known as flatworms, are a phylum of invertebrate animals that includes free-living and parasitic forms. They are characterized by their soft, flat bodies, which lack a body cavity or circulatory system. The phylum Platyhelminthes is divided into several classes, including Turbellaria (free-living flatworms), Monogenea (ectoparasites on fish gills and skin), Trematoda (flukes, parasites in mollusks and vertebrates), and Cestoda (tapeworms, intestinal parasites of vertebrates). Platyhelminths are bilaterally symmetrical, triploblastic, and unsegmented. They have a simple digestive system that consists of a mouth and a gut, but no anus. The nervous system is characterized by a brain and a ladder-like series of nerve cords running along the length of the body. Reproduction in platyhelminths can be either sexual or asexual, depending on the species.

Fungal DNA refers to the genetic material present in fungi, which are a group of eukaryotic organisms that include microorganisms such as yeasts and molds, as well as larger organisms like mushrooms. The DNA of fungi, like that of all living organisms, is made up of nucleotides that are arranged in a double helix structure.

Fungal DNA contains the genetic information necessary for the growth, development, and reproduction of fungi. This includes the instructions for making proteins, which are essential for the structure and function of cells, as well as other important molecules such as enzymes and nucleic acids.

Studying fungal DNA can provide valuable insights into the biology and evolution of fungi, as well as their potential uses in medicine, agriculture, and industry. For example, researchers have used genetic engineering techniques to modify the DNA of fungi to produce drugs, biofuels, and other useful products. Additionally, understanding the genetic makeup of pathogenic fungi can help scientists develop new strategies for preventing and treating fungal infections.

I am not aware of a widely accepted medical definition for the term "software," as it is more commonly used in the context of computer science and technology. Software refers to programs, data, and instructions that are used by computers to perform various tasks. It does not have direct relevance to medical fields such as anatomy, physiology, or clinical practice. If you have any questions related to medicine or healthcare, I would be happy to try to help with those instead!

Sequence homology is a term used in molecular biology to describe the similarity between the nucleotide or amino acid sequences of two or more genes or proteins. It is a measure of the degree to which the sequences are related, indicating a common evolutionary origin.

In other words, sequence homology implies that the compared sequences have a significant number of identical or similar residues in the same order, suggesting that they share a common ancestor and have diverged over time through processes such as mutation, insertion, deletion, or rearrangement. The higher the degree of sequence homology, the more closely related the sequences are likely to be.

Sequence homology is often used to identify similarities between genes or proteins from different species, which can provide valuable insights into their functions, structures, and evolutionary relationships. It is commonly assessed using various bioinformatics tools and algorithms, such as BLAST (Basic Local Alignment Search Tool), Clustal Omega, and multiple sequence alignment (MSA) methods.

Gene order, in the context of genetics and genomics, refers to the specific sequence or arrangement of genes along a chromosome. The order of genes on a chromosome is not random, but rather, it is highly conserved across species and is often used as a tool for studying evolutionary relationships between organisms.

The study of gene order has also provided valuable insights into genome organization, function, and regulation. For example, the clustering of genes that are involved in specific pathways or functions can provide information about how those pathways or functions have evolved over time. Similarly, the spatial arrangement of genes relative to each other can influence their expression levels and patterns, which can have important consequences for phenotypic traits.

Overall, gene order is an important aspect of genome biology that continues to be a focus of research in fields such as genomics, genetics, evolutionary biology, and bioinformatics.

Cetacea is a taxonomic order that includes whales, dolphins, and porpoises. This group of marine mammals is characterized by their fully aquatic lifestyle, torpedo-shaped bodies, modified limbs that serve as flippers, and the absence of external hindlimbs. Cetaceans have streamlined bodies that minimize drag while swimming, and their tail flukes enable powerful propulsion through vertical movement in the water column.

Their respiratory system features a pair of blowholes on the top of their heads, which they use to breathe air at the surface. Cetaceans exhibit complex social behaviors, advanced communication skills, and sophisticated echolocation abilities for navigation and hunting. They primarily feed on fish and invertebrates, with some larger species preying on marine mammals.

Cetaceans have a global distribution, occupying various habitats such as open oceans, coastal areas, and rivers. Unfortunately, many cetacean populations face threats from human activities like pollution, habitat degradation, climate change, and direct hunting or bycatch in fishing gear. Conservation efforts are crucial to protect these remarkable creatures and their vital roles in marine ecosystems.

I believe there may be a misunderstanding in your question. The term "fishes" is not typically used in a medical context. "Fish" or "fishes" refers to any aquatic organism belonging to the taxonomic class Actinopterygii (bony fish), Chondrichthyes (sharks and rays), or Agnatha (jawless fish).

However, if you are referring to a condition related to fish or consuming fish, there is a medical issue called scombroid fish poisoning. It's a foodborne illness caused by eating spoiled or improperly stored fish from the Scombridae family, which includes tuna, mackerel, and bonito, among others. The bacteria present in these fish can produce histamine, which can cause symptoms like skin flushing, headache, diarrhea, and itchy rash. But again, this is not related to the term "fishes" itself but rather a condition associated with consuming certain types of fish.

I'm happy to help! However, I believe there might be a slight mistake in your question. "Archaeal" is not a term used to describe genes but rather a group of single-celled organisms that are classified as archaea.

Archaea are one of the three domains of life, along with bacteria and eukaryotes (which include plants, animals, and fungi). Archaea are unique because they share characteristics with both bacteria and eukaryotes, but they also have many features that are distinctly their own. For example, archaea have a different cell membrane structure than bacteria and eukaryotes, which allows them to thrive in extreme environments such as hot springs, salt mines, and deep-sea vents.

Genes, on the other hand, are segments of DNA that contain the instructions for making proteins or performing other important functions in an organism's cells. All living organisms, including archaea, have genes that are passed down from generation to generation. Archaeal genes are made up of the same four nucleotides (A, T, C, and G) as bacterial and eukaryotic genes, and they code for proteins and RNA molecules that are essential for the survival and reproduction of archaea.

So, to summarize, there is no specific definition for "Archaeal genes" because "archaeal" is not a term used to describe genes. However, we can say that archaeal genes are segments of DNA that contain the instructions for making proteins and performing other important functions in archaea.

I apologize for any confusion, but "lizards" is not a term used in medical definition. Lizards are a group of scaled reptiles constituting the order Squamata, characterized by having skin covered with overlapping scales, external ears, and movable eyelids. They are found worldwide in a variety of habitats, ranging from desert to tropical environments. If you have any questions related to medical terminology or health concerns, I'd be happy to help!

Rhodophyta, also known as red algae, is a division of simple, multicellular and complex marine algae. These organisms are characterized by their red pigmentation due to the presence of phycobiliproteins, specifically R-phycoerythrin and phycocyanin. They lack flagella and centrioles at any stage of their life cycle. The cell walls of Rhodophyta contain cellulose and various sulphated polysaccharides. Some species have calcium carbonate deposits in their cell walls, which contribute to the formation of coral reefs. Reproduction in these organisms is typically alternation of generations with a dominant gametophyte generation. They are an important source of food for many marine animals and have commercial value as well, particularly for the production of agar, carrageenan, and other products used in the food, pharmaceutical, and cosmetic industries.

Ciliophora is a phylum in the taxonomic classification system that consists of unicellular organisms commonly known as ciliates. These are characterized by the presence of hair-like structures called cilia, which are attached to the cell surface and beat in a coordinated manner to facilitate movement and feeding. Ciliophora includes a diverse group of organisms, many of which are found in aquatic environments. Examples of ciliates include Paramecium, Tetrahymena, and Vorticella.

Paleontology is not a medical field, but rather it is a branch of earth sciences and biology that deals with the study of prehistoric life forms through the examination of plant and animal fossils, including those of extinct organisms. It involves various disciplines such as stratigraphy, geochronology, and systematics to understand the evolutionary history of life on Earth.

However, I understand that you are looking for information related to a non-medical topic, so here is some additional context:

Paleontology can be divided into several subdisciplines, including vertebrate paleontology (the study of fossilized animals with backbones), invertebrate paleontology (the study of fossilized animals without backbones), paleobotany (the study of fossil plants), micropaleontology (the study of microscopic fossils), and taphonomy (the study of the processes that occur after an organism's death, leading to its preservation as a fossil).

Paleontologists use various techniques to study fossils, including comparative anatomy, histology (the study of tissue structure), and geochemistry. They also rely on other scientific fields such as genetics, physics, and chemistry to help them interpret the data they collect from fossils.

Through their research, paleontologists can learn about the morphology, behavior, ecology, and evolutionary relationships of extinct organisms, providing valuable insights into the history of life on Earth.

Intergenic DNA refers to the stretches of DNA that are located between genes. These regions do not contain coding sequences for proteins or RNA and thus were once thought to be "junk" DNA with no function. However, recent research has shown that intergenic DNA can play important roles in the regulation of gene expression, chromosome structure and stability, and other cellular processes. Intergenic DNA may contain various types of regulatory elements such as enhancers, silencers, insulators, and promoters that control the transcription of nearby genes. Additionally, intergenic DNA can also include repetitive sequences, transposable elements, and other non-coding RNAs that have diverse functions in the cell.

I apologize for any confusion, but "insects" are not a medical term. Insects are small air-breathing arthropods that have a segmented body with six legs and usually have wings. They make up the largest group of animals on Earth, with over a million described species.

If you're looking for information about a specific medical condition or topic, please provide more details so I can offer a relevant response.

Hominidae, also known as the "great apes," is a family of primates that includes humans (Homo sapiens), orangutans (Pongo pygmaeus), gorillas (Gorilla gorilla and Gorilla beringei), bonobos (Pan paniscus), and chimpanzees (Pan troglodytes). This family is characterized by their upright walking ability, although not all members exhibit this trait. Hominidae species are known for their high intelligence, complex social structures, and expressive facial features. They share a common ancestor with the Old World monkeys, and fossil records suggest that this split occurred around 25 million years ago.

Fungi, in the context of medical definitions, are a group of eukaryotic organisms that include microorganisms such as yeasts and molds, as well as the more familiar mushrooms. The study of fungi is known as mycology.

Fungi can exist as unicellular organisms or as multicellular filamentous structures called hyphae. They are heterotrophs, which means they obtain their nutrients by decomposing organic matter or by living as parasites on other organisms. Some fungi can cause various diseases in humans, animals, and plants, known as mycoses. These infections range from superficial, localized skin infections to systemic, life-threatening invasive diseases.

Examples of fungal infections include athlete's foot (tinea pedis), ringworm (dermatophytosis), candidiasis (yeast infection), histoplasmosis, coccidioidomycosis, and aspergillosis. Fungal infections can be challenging to treat due to the limited number of antifungal drugs available and the potential for drug resistance.

Chloroplast genes refer to the genetic material present within chloroplasts, which are specialized organelles in plant and algal cells that conduct photosynthesis. Chloroplasts have their own DNA, separate from the nuclear DNA of the cell, and can replicate independently. The chloroplast genome is relatively small and contains codes for some of the essential proteins required for photosynthesis and chloroplast function.

The chloroplast genome typically includes genes for components of the photosystems, such as Psa and Psb genes that encode for subunits of Photosystem I and II respectively, as well as genes for the large and small ribosomal RNAs (rRNA) and transfer RNAs (tRNA) required for protein synthesis within the chloroplast. However, many chloroplast proteins are actually encoded by nuclear genes and are imported into the chloroplast after their synthesis in the cytoplasm.

It is believed that chloroplasts originated from ancient photosynthetic bacteria through endosymbiosis, where the bacterial cells were engulfed by a eukaryotic cell and eventually became permanent organelles within the host cell. Over time, much of the bacterial genome was either lost or transferred to the host cell's nucleus, resulting in the modern-day chloroplast genome.

5.8S ribosomal RNA (rRNA) is a type of structural RNA molecule that is a component of the large subunit of eukaryotic ribosomes. It is one of the several rRNA species that are present in the ribosome, which also include the 18S rRNA in the small subunit and the 28S and 5S rRNAs in the large subunit. The 5.8S rRNA plays a role in the translation process, where it helps in the decoding of messenger RNA (mRNA) during protein synthesis. It is transcribed from DNA as part of a larger precursor RNA molecule, which is then processed to produce the mature 5.8S rRNA. The length of the 5.8S rRNA varies slightly between species, but it is generally around 160 nucleotides long in humans.

Gastropoda is not a medical term, but a taxonomic category in biology. It refers to a large and diverse class of mollusks, commonly known as snails and slugs. These animals are characterized by a single, spiral-shaped shell that they carry on their backs (in the case of snails) or an internal shell (in the case of some slugs).

While Gastropoda is not a medical term per se, it's worth noting that certain species of gastropods can have medical relevance. For instance, some types of marine snails produce toxins that can be harmful or even fatal to humans if ingested. Additionally, some species of slugs and snails can serve as intermediate hosts for parasites that can infect humans, such as rat lungworms (Angiostrongylus cantonensis), which can cause a form of meningitis known as eosinophilic meningoencephalitis.

I'm sorry for any confusion, but "Madagascar" is not a medical term. It is actually the fourth-largest island country in the world, located in the Indian Ocean, off the southeastern coast of Africa. If you have any questions about medical terms or concepts, I'd be happy to help answer those!

Kinetoplastida is a group of flagellated protozoan parasites, which are characterized by the presence of a unique structure called the kinetoplast, a DNA-containing region within the single, large mitochondrion. The kinetoplast contains numerous maxicircles and minicircles that encode essential components for energy metabolism.

This order includes several medically important genera such as Trypanosoma and Leishmania, which are responsible for causing various diseases in humans and animals. Trypanosoma species cause diseases like African sleeping sickness (Trypanosoma brucei) and Chagas disease (Trypanosoma cruzi), while Leishmania species are the causative agents of leishmaniasis.

These parasites have complex life cycles involving different hosts and developmental stages, often exhibiting morphological and biochemical changes during their life cycle. They can be transmitted to humans through insect vectors such as tsetse flies (African trypanosomiasis) and sandflies (leishmaniasis).

The medical significance of Kinetoplastida lies in the understanding of their biology, pathogenesis, and epidemiology, which are crucial for developing effective control strategies and treatments against the diseases they cause.

Chlorophyta is a division of green algae, also known as green plants. This group includes a wide variety of simple, aquatic organisms that contain chlorophylls a and b, which gives them their characteristic green color. They are a diverse group, ranging from unicellular forms to complex multicellular seaweeds. Chlorophyta is a large and varied division with approximately 7,00

Polymerase Chain Reaction (PCR) is a laboratory technique used to amplify specific regions of DNA. It enables the production of thousands to millions of copies of a particular DNA sequence in a rapid and efficient manner, making it an essential tool in various fields such as molecular biology, medical diagnostics, forensic science, and research.

The PCR process involves repeated cycles of heating and cooling to separate the DNA strands, allow primers (short sequences of single-stranded DNA) to attach to the target regions, and extend these primers using an enzyme called Taq polymerase, resulting in the exponential amplification of the desired DNA segment.

In a medical context, PCR is often used for detecting and quantifying specific pathogens (viruses, bacteria, fungi, or parasites) in clinical samples, identifying genetic mutations or polymorphisms associated with diseases, monitoring disease progression, and evaluating treatment effectiveness.

"Hylobates" is not a medical term, but a biological genus name. It refers to a group of small, tailless primates known as gibbons or lesser apes, which are native to the forests of Southeast Asia. They are known for their agility in moving through trees by brachiation (arm-over-arm swinging).

There are currently 10 species recognized in the genus Hylobates, including the lar gibbon, agile gibbon, and siamang. While not a medical term, understanding the natural history of animals like gibbons can be important for medical professionals who work with them or study their diseases, as well as for conservationists and others interested in their welfare.

Basidiomycota is a phylum in the kingdom Fungi that consists of organisms commonly known as club fungi or club mushrooms. The name Basidiomycota is derived from the presence of a characteristic reproductive structure called a basidium, which is where spores are produced.

The basidiomycetes include many familiar forms such as mushrooms, toadstools, bracket fungi, and other types of polypores. They have a complex life cycle that involves both sexual and asexual reproduction. The sexual reproductive stage produces a characteristic fruiting body, which may be microscopic or highly visible, depending on the species.

Basidiomycota fungi play important ecological roles in decomposing organic matter, forming mutualistic relationships with plants, and acting as parasites on other organisms. Some species are economically important, such as edible mushrooms, while others can be harmful or even deadly to humans and animals.

I'm sorry for any confusion, but "geology" is not a medical term. It is a scientific discipline that deals with the Earth's physical structure and substance, its history, and the processes that act on it. If you have any questions about medical terminology or concepts, I would be happy to help!

Prokaryotic cells are simple, single-celled organisms that do not have a true nucleus or other membrane-bound organelles. They include bacteria and archaea. The genetic material of prokaryotic cells is composed of a single circular chromosome located in the cytoplasm, along with small, circular pieces of DNA called plasmids. Prokaryotic cells have a rigid cell wall, which provides protection and support, and a flexible outer membrane that helps them to survive in diverse environments. They reproduce asexually by binary fission, where the cell divides into two identical daughter cells. Compared to eukaryotic cells, prokaryotic cells are generally smaller and have a simpler structure.

A genetic database is a type of biomedical or health informatics database that stores and organizes genetic data, such as DNA sequences, gene maps, genotypes, haplotypes, and phenotype information. These databases can be used for various purposes, including research, clinical diagnosis, and personalized medicine.

There are different types of genetic databases, including:

1. Genomic databases: These databases store whole genome sequences, gene expression data, and other genomic information. Examples include the National Center for Biotechnology Information's (NCBI) GenBank, the European Nucleotide Archive (ENA), and the DNA Data Bank of Japan (DDBJ).
2. Gene databases: These databases contain information about specific genes, including their location, function, regulation, and evolution. Examples include the Online Mendelian Inheritance in Man (OMIM) database, the Universal Protein Resource (UniProt), and the Gene Ontology (GO) database.
3. Variant databases: These databases store information about genetic variants, such as single nucleotide polymorphisms (SNPs), insertions/deletions (INDELs), and copy number variations (CNVs). Examples include the Database of Single Nucleotide Polymorphisms (dbSNP), the Catalogue of Somatic Mutations in Cancer (COSMIC), and the International HapMap Project.
4. Clinical databases: These databases contain genetic and clinical information about patients, such as their genotype, phenotype, family history, and response to treatments. Examples include the ClinVar database, the Pharmacogenomics Knowledgebase (PharmGKB), and the Genetic Testing Registry (GTR).
5. Population databases: These databases store genetic information about different populations, including their ancestry, demographics, and genetic diversity. Examples include the 1000 Genomes Project, the Human Genome Diversity Project (HGDP), and the Allele Frequency Net Database (AFND).

Genetic databases can be publicly accessible or restricted to authorized users, depending on their purpose and content. They play a crucial role in advancing our understanding of genetics and genomics, as well as improving healthcare and personalized medicine.

'Insectivora' is an outdated taxonomic grouping that was once used to classify small, insect-eating mammals. This order included shrews, moles, hedgehogs, and several other related species. However, modern molecular evidence has revealed that this grouping is not monophyletic, meaning it does not include all descendants of a common ancestor. As a result, the order Insectivora is no longer recognized in current taxonomy. Instead, these animals are now classified into several different orders based on their evolutionary relationships.

Gammaproteobacteria is a class of proteobacteria, a group of Gram-negative bacteria. This class includes several important pathogens that can cause various diseases in humans, animals, and plants. Some examples of Gammaproteobacteria include Escherichia coli (a common cause of food poisoning), Pseudomonas aeruginosa (a leading cause of hospital-acquired infections), Vibrio cholerae (the causative agent of cholera), and Yersinia pestis (the bacterium that causes plague).

Gammaproteobacteria are characterized by their single flagellum, which is used for motility, and their outer membrane, which contains lipopolysaccharides that can elicit an immune response in host organisms. They are found in a wide range of environments, including soil, water, and the guts of animals. Some species are capable of fixing nitrogen, making them important contributors to nutrient cycling in ecosystems.

It's worth noting that while Gammaproteobacteria includes many pathogenic species, the majority of proteobacteria are not harmful and play important roles in various ecological systems.

I'm sorry for any confusion, but "Liliaceae" is not a medical term. It is a taxonomic category in botany, specifically it is the family name for plants that include lilies, tulips, and related species. In a medical context, you might be referring to the specific plant species themselves, or possibly the allergic reactions some people can have to the pollen of these plants. If you have any more specific questions about botanical terms in a medical context, I'd be happy to try and help further.

A conserved sequence in the context of molecular biology refers to a pattern of nucleotides (in DNA or RNA) or amino acids (in proteins) that has remained relatively unchanged over evolutionary time. These sequences are often functionally important and are highly conserved across different species, indicating strong selection pressure against changes in these regions.

In the case of protein-coding genes, the corresponding amino acid sequence is deduced from the DNA sequence through the genetic code. Conserved sequences in proteins may indicate structurally or functionally important regions, such as active sites or binding sites, that are critical for the protein's activity. Similarly, conserved non-coding sequences in DNA may represent regulatory elements that control gene expression.

Identifying conserved sequences can be useful for inferring evolutionary relationships between species and for predicting the function of unknown genes or proteins.

Multilocus Sequence Typing (MLST) is a standardized method used in microbiology to characterize and identify bacterial isolates at the subspecies level. It is based on the sequencing of several (usually 7-10) housekeeping genes, which are essential for the survival of the organism and have a low rate of mutation. The sequence type (ST) is determined by the specific alleles present at each locus, creating a unique profile that can be used to compare and cluster isolates into clonal complexes or sequence types. This method provides high-resolution discrimination between closely related strains and has been widely adopted for molecular epidemiology, infection control, and population genetics studies of bacterial pathogens.

A plant genome refers to the complete set of genetic material or DNA present in the cells of a plant. It contains all the hereditary information necessary for the development and functioning of the plant, including its structural and functional characteristics. The plant genome includes both coding regions that contain instructions for producing proteins and non-coding regions that have various regulatory functions.

The plant genome is composed of several types of DNA molecules, including chromosomes, which are located in the nucleus of the cell. Each chromosome contains one or more genes, which are segments of DNA that code for specific proteins or RNA molecules. Plants typically have multiple sets of chromosomes, with each set containing a complete copy of the genome.

The study of plant genomes is an active area of research in modern biology, with important applications in areas such as crop improvement, evolutionary biology, and medical research. Advances in DNA sequencing technologies have made it possible to determine the complete sequences of many plant genomes, providing valuable insights into their structure, function, and evolution.

Asteraceae is a family of flowering plants commonly known as the daisy family or sunflower family. It is one of the largest and most diverse families of vascular plants, with over 1,900 genera and 32,000 species. The family includes a wide variety of plants, ranging from annual and perennial herbs to shrubs and trees.

The defining characteristic of Asteraceae is the presence of a unique type of inflorescence called a capitulum, which resembles a single flower but is actually composed of many small flowers (florets) arranged in a dense head. The florets are typically bisexual, with both male and female reproductive structures, and are radially symmetrical.

Asteraceae includes many economically important plants, such as sunflowers, daisies, artichokes, lettuce, chicory, and ragweed. Some species of Asteraceae are also used in traditional medicine and have been found to contain bioactive compounds with potential therapeutic uses.

It's worth noting that the taxonomy of this family has undergone significant revisions in recent years, and some genera and species have been moved to other families or renamed.

I'm sorry for any confusion, but "South America" is not a medical term. It is a geographical term that refers to the southern portion of the Americas, which is a continent in the Western Hemisphere. South America is generally defined as including the countries of Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Suriname, Uruguay, and Venezuela, as well as the overseas departments and territories of French Guiana (France), and the Falkland Islands (UK).

If you have any questions related to medical terminology or health-related topics, I would be happy to help answer them for you.

Sequence homology, amino acid, refers to the similarity in the order of amino acids in a protein or a portion of a protein between two or more species. This similarity can be used to infer evolutionary relationships and functional similarities between proteins. The higher the degree of sequence homology, the more likely it is that the proteins are related and have similar functions. Sequence homology can be determined through various methods such as pairwise alignment or multiple sequence alignment, which compare the sequences and calculate a score based on the number and type of matching amino acids.

Cryptophyta is a taxonomic division that refers to a group of unicellular algae called cryptomonads. These organisms are characterized by the presence of unique organelles called ejectisomes, which they use for defense and prey capture. They are also known for having two flagella and distinctive eyespot structures. Cryptophytes are widely distributed in aquatic environments and can be found in both freshwater and marine habitats. Some species are capable of carrying out photosynthesis, while others are heterotrophic, obtaining nutrients by consuming other organisms. The study of cryptomonads is important for understanding the evolution of eukaryotic cells and their complex organelles.

A ribosome is a complex molecular machine found in all living cells, responsible for protein synthesis. It consists of two subunits: the small and the large subunit. The small ribosomal subunit plays a crucial role in decoding the messenger RNA (mRNA) molecule and positioning transfer RNA (tRNA) molecules during translation.

The small ribosomal subunit, specifically, is composed of ribosomal RNA (rRNA) and proteins. In eukaryotic cells, the small ribosomal subunit is composed of a 18S rRNA molecule and approximately 30 distinct proteins. Its primary function is to recognize the start codon on the mRNA and facilitate the binding of the initiator tRNA (tRNAi) to begin the translation process.

Together, the small and large ribosomal subunits form a functional ribosome that translates genetic information from mRNA into proteins, contributing to the maintenance and growth of cells.

Eukaryotic cells are complex cells that characterize the cells of all living organisms except bacteria and archaea. They are typically larger than prokaryotic cells and contain a true nucleus and other membrane-bound organelles. The nucleus houses the genetic material, DNA, which is organized into chromosomes. Other organelles include mitochondria, responsible for energy production; chloroplasts, present in plant cells and responsible for photosynthesis; endoplasmic reticulum, involved in protein synthesis; Golgi apparatus, involved in the processing and transport of proteins and lipids; lysosomes, involved in digestion and waste disposal; and vacuoles, involved in storage and waste management. Eukaryotic cells also have a cytoskeleton made up of microtubules, intermediate filaments, and actin filaments that provide structure, support, and mobility to the cell.

Crustacea is a subphylum of Arthropoda, which is a phylum that includes animals without backbones and with jointed appendages. Crustaceans are characterized by their segmented bodies, usually covered with a hard exoskeleton made of chitin, and paired, jointed limbs.

Examples of crustaceans include crabs, lobsters, shrimps, crayfish, krill, barnacles, and copepods. Many crustaceans are aquatic, living in both freshwater and marine environments, while some are terrestrial. They can vary greatly in size, from tiny planktonic organisms to large crabs and lobsters.

Crustaceans have a complex life cycle that typically involves several distinct stages, including larval and adult forms. They are an important part of many aquatic ecosystems, serving as both predators and prey. Crustaceans also have economic importance as a source of food for humans, with crabs, lobsters, and shrimps being among the most commonly consumed.

"Ficus" is not a medical term. It is a genus of plants, including the fig tree, which is widely distributed in tropical and subtropical regions. Some species of Ficus are used in traditional medicine, but "Ficus" itself does not have a specific medical definition.

DNA primers are short single-stranded DNA molecules that serve as a starting point for DNA synthesis. They are typically used in laboratory techniques such as the polymerase chain reaction (PCR) and DNA sequencing. The primer binds to a complementary sequence on the DNA template through base pairing, providing a free 3'-hydroxyl group for the DNA polymerase enzyme to add nucleotides and synthesize a new strand of DNA. This allows for specific and targeted amplification or analysis of a particular region of interest within a larger DNA molecule.

A genome is the complete set of genetic material present within an organism. In eukaryotic cells, which include plants, animals, and other complex life forms, the genome is divided into several compartments, including the nucleus (where most of the genetic material is housed) and the plastids (which include chloroplasts in plant cells).

A plastid genome, also known as a plastome, is the genetic material found within a plastid. Plastids are organelles found in the cells of plants, algae, and some protists that are involved in various metabolic processes, including photosynthesis. The plastid genome is typically a circular molecule of DNA that contains genes encoding for proteins, ribosomal RNA (rRNA), and transfer RNA (tRNA) that are necessary for the function and maintenance of the plastid.

The plastid genome is relatively small compared to the nuclear genome, typically ranging from 120-160 kilobases in length. The gene content and organization of plastid genomes are highly conserved across different plant species, making them useful tools for studying evolutionary relationships among plants. Additionally, because plastids are maternally inherited in many plant species, the plastid genome has been used to study patterns of maternal inheritance and hybridization in plants.

I'm sorry for any confusion, but "Panama" is not a medical term. It is a country located in Central America, known for its famous canal and diverse wildlife. If you have any questions about medical terms or conditions, I would be happy to help answer those!

Proteobacteria is a major class of Gram-negative bacteria that includes a wide variety of pathogens and free-living organisms. This class is divided into six subclasses: Alpha, Beta, Gamma, Delta, Epsilon, and Zeta proteobacteria. Proteobacteria are characterized by their single circular chromosome and the presence of lipopolysaccharide (LPS) in their outer membrane. They can be found in a wide range of environments, including soil, water, and the gastrointestinal tracts of animals. Some notable examples of Proteobacteria include Escherichia coli, Salmonella enterica, and Yersinia pestis.

A haplotype is a group of genes or DNA sequences that are inherited together from a single parent. It refers to a combination of alleles (variant forms of a gene) that are located on the same chromosome and are usually transmitted as a unit. Haplotypes can be useful in tracing genetic ancestry, understanding the genetic basis of diseases, and developing personalized medical treatments.

In population genetics, haplotypes are often used to study patterns of genetic variation within and between populations. By comparing haplotype frequencies across populations, researchers can infer historical events such as migrations, population expansions, and bottlenecks. Additionally, haplotypes can provide information about the evolutionary history of genes and genomic regions.

In clinical genetics, haplotypes can be used to identify genetic risk factors for diseases or to predict an individual's response to certain medications. For example, specific haplotypes in the HLA gene region have been associated with increased susceptibility to certain autoimmune diseases, while other haplotypes in the CYP450 gene family can affect how individuals metabolize drugs.

Overall, haplotypes provide a powerful tool for understanding the genetic basis of complex traits and diseases, as well as for developing personalized medical treatments based on an individual's genetic makeup.

A bacterial gene is a segment of DNA (or RNA in some viruses) that contains the genetic information necessary for the synthesis of a functional bacterial protein or RNA molecule. These genes are responsible for encoding various characteristics and functions of bacteria such as metabolism, reproduction, and resistance to antibiotics. They can be transmitted between bacteria through horizontal gene transfer mechanisms like conjugation, transformation, and transduction. Bacterial genes are often organized into operons, which are clusters of genes that are transcribed together as a single mRNA molecule.

It's important to note that the term "bacterial gene" is used to describe genetic elements found in bacteria, but not all genetic elements in bacteria are considered genes. For example, some DNA sequences may not encode functional products and are therefore not considered genes. Additionally, some bacterial genes may be plasmid-borne or phage-borne, rather than being located on the bacterial chromosome.

Synteny, in the context of genetics and genomics, refers to the presence of two or more genetic loci (regions) on the same chromosome, in the same relative order and orientation. This term is often used to describe conserved gene organization between different species, indicating a common ancestry.

It's important to note that synteny should not be confused with "colinearity," which refers to the conservation of gene content and order within a genome or between genomes of closely related species. Synteny is a broader concept that can also include conserved gene order across more distantly related species, even if some genes have been lost or gained in the process.

In medical research, synteny analysis can be useful for identifying conserved genetic elements and regulatory regions that may play important roles in disease susceptibility or other biological processes.

Bacterial RNA refers to the genetic material present in bacteria that is composed of ribonucleic acid (RNA). Unlike higher organisms, bacteria contain a single circular chromosome made up of DNA, along with smaller circular pieces of DNA called plasmids. These bacterial genetic materials contain the information necessary for the growth and reproduction of the organism.

Bacterial RNA can be divided into three main categories: messenger RNA (mRNA), ribosomal RNA (rRNA), and transfer RNA (tRNA). mRNA carries genetic information copied from DNA, which is then translated into proteins by the rRNA and tRNA molecules. rRNA is a structural component of the ribosome, where protein synthesis occurs, while tRNA acts as an adapter that brings amino acids to the ribosome during protein synthesis.

Bacterial RNA plays a crucial role in various cellular processes, including gene expression, protein synthesis, and regulation of metabolic pathways. Understanding the structure and function of bacterial RNA is essential for developing new antibiotics and other therapeutic strategies to combat bacterial infections.

Base composition in genetics refers to the relative proportion of the four nucleotide bases (adenine, thymine, guanine, and cytosine) in a DNA or RNA molecule. In DNA, adenine pairs with thymine, and guanine pairs with cytosine, so the base composition is often expressed in terms of the ratio of adenine + thymine (A-T) to guanine + cytosine (G-C). This ratio can vary between species and even between different regions of the same genome. The base composition can provide important clues about the function, evolution, and structure of genetic material.

I'm sorry for any confusion, but "Hepatophyta" is not a valid medical or scientific term in modern usage. It appears to be a combination of the Greek word "hepar" meaning "liver" and the suffix "-phyta" which is used to denote a plant or group of plants in taxonomy. However, it is not a term that is recognized or used in modern biology or medicine.

It's possible that you may be thinking of "Hepatica," which is a genus of flowering plants in the family Ranunculaceae. These plants are also known as liverworts, although they should not be confused with actual liverworts, which are non-vascular plants in the division Marchantiophyta.

If you have any further questions or if there is another term you would like me to define, please let me know!

A gene in plants, like in other organisms, is a hereditary unit that carries genetic information from one generation to the next. It is a segment of DNA (deoxyribonucleic acid) that contains the instructions for the development and function of an organism. Genes in plants determine various traits such as flower color, plant height, resistance to diseases, and many others. They are responsible for encoding proteins and RNA molecules that play crucial roles in the growth, development, and reproduction of plants. Plant genes can be manipulated through traditional breeding methods or genetic engineering techniques to improve crop yield, enhance disease resistance, and increase nutritional value.

DNA barcoding is a method used in molecular biology to identify and distinguish species based on the analysis of short, standardized gene regions. In taxonomic DNA barcoding, a specific region of the mitochondrial cytochrome c oxidase I (COI) gene is typically used as the barcode for animals.

The process involves extracting DNA from a sample, amplifying the target barcode region using polymerase chain reaction (PCR), and then sequencing the resulting DNA fragment. The resulting sequence is then compared to a reference database of known barcode sequences to identify the species of the sample.

DNA barcoding has become a valuable tool in taxonomy, biodiversity studies, forensic science, and other fields where accurate identification of species is important. It can be particularly useful for identifying cryptic or morphologically similar species that are difficult to distinguish based on traditional methods.

A computer simulation is a process that involves creating a model of a real-world system or phenomenon on a computer and then using that model to run experiments and make predictions about how the system will behave under different conditions. In the medical field, computer simulations are used for a variety of purposes, including:

1. Training and education: Computer simulations can be used to create realistic virtual environments where medical students and professionals can practice their skills and learn new procedures without risk to actual patients. For example, surgeons may use simulation software to practice complex surgical techniques before performing them on real patients.
2. Research and development: Computer simulations can help medical researchers study the behavior of biological systems at a level of detail that would be difficult or impossible to achieve through experimental methods alone. By creating detailed models of cells, tissues, organs, or even entire organisms, researchers can use simulation software to explore how these systems function and how they respond to different stimuli.
3. Drug discovery and development: Computer simulations are an essential tool in modern drug discovery and development. By modeling the behavior of drugs at a molecular level, researchers can predict how they will interact with their targets in the body and identify potential side effects or toxicities. This information can help guide the design of new drugs and reduce the need for expensive and time-consuming clinical trials.
4. Personalized medicine: Computer simulations can be used to create personalized models of individual patients based on their unique genetic, physiological, and environmental characteristics. These models can then be used to predict how a patient will respond to different treatments and identify the most effective therapy for their specific condition.

Overall, computer simulations are a powerful tool in modern medicine, enabling researchers and clinicians to study complex systems and make predictions about how they will behave under a wide range of conditions. By providing insights into the behavior of biological systems at a level of detail that would be difficult or impossible to achieve through experimental methods alone, computer simulations are helping to advance our understanding of human health and disease.

Cercopithecidae is a family of Old World primates, which includes monkeys such as baboons, macaques, and langurs. These primates are characterized by their adaptations for arboreal or terrestrial living, and they have complex social structures. The family Cercopithecidae is divided into two subfamilies: Cercopithecinae (guenons, macaques, and langurs) and Colobinae (leaf monkeys and colobus monkeys). These primates are found in Africa and Asia, and they play important ecological roles in their environments.

I apologize for any confusion, but "Asia" is not a medical term. It is the largest continent in the world, comprising about 30% of the Earth's total land area and containing around 60% of the world's current human population. It is divided into several regions, including Northern Asia (Siberia), Eastern Asia (China, Japan, Korea, Mongolia, Taiwan), Southern Asia (India, Pakistan, Bangladesh, Sri Lanka, Maldives), Southeastern Asia (Vietnam, Thailand, Indonesia, Philippines, Malaysia, Singapore, Myanmar, Cambodia, Laos, Brunei), and Western Asia (Middle East).

If you have any questions related to medical terminology or health-related topics, I'd be happy to help.

Short Interspersed Nucleotide Elements (SINEs) are a type of transposable element in the genome. They are short sequences of DNA, typically around 100-300 base pairs in length, that are interspersed throughout the non-coding regions of the genome. SINEs are derived from small RNA genes, such as tRNAs and 7SL RNA, and are copied and inserted into new locations in the genome through a process called retrotransposition.

SINEs are usually non-coding and do not contain any known functional elements, but they can have regulatory effects on gene expression by affecting chromatin structure and transcription factor binding. They can also contribute to genetic diversity and evolution by creating new mutations and genomic rearrangements. However, the insertion of SINEs into genes or regulatory regions can also cause genetic diseases and cancer.

SINEs are one of the most abundant types of transposable elements in mammalian genomes, accounting for a significant fraction of the non-coding DNA. They are particularly enriched in the brain, suggesting a possible role in neural function and evolution.

I'm sorry for any confusion, but "geological phenomena" is not a term typically used in medical definitions. Geological phenomena refer to natural processes and features related to the earth's physical structure, composition, and the various changes it undergoes over time. This could include things like volcanic eruptions, earthquakes, rock formations, or the formation of fossil fuels. If you have a term that you would like me to provide a medical definition for, I'd be happy to help!

"Solanaceae" is not a medical term but a taxonomic category in biology, referring to the Nightshade family of plants. This family includes several plants that have economic and medicinal importance, as well as some that are toxic or poisonous. Some common examples of plants in this family include:

- Solanum lycopersicum (tomato)
- Solanum tuberosum (potato)
- Capsicum annuum (bell pepper and chili pepper)
- Nicotiana tabacum (tobacco)
- Atropa belladonna (deadly nightshade)
- Hyoscyamus niger (henbane)

While Solanaceae isn't a medical term itself, certain plants within this family have medical significance. For instance, some alkaloids found in these plants can be used as medications or pharmaceutical precursors, such as atropine and scopolamine from Atropa belladonna, hyoscine from Hyoscyamus niger, and capsaicin from Capsicum species. However, it's important to note that many of these plants also contain toxic compounds, so they must be handled with care and used only under professional supervision.

Echinodermata is a phylum in the animal kingdom that includes various marine organisms such as sea stars, sea urchins, sand dollars, brittle stars, and sea cucumbers. The name Echinodermata comes from the Greek words "echinos," meaning spiny, and "derma," meaning skin, which refers to the characteristic spiny skin of many echinoderms.

Echinoderms are bilaterally symmetrical as larvae but become radially symmetrical as adults, with their bodies organized around a central axis. They have a unique water vascular system that helps them move and respire, and most species have specialized structures called pedicellariae that help them clean and defend themselves.

Echinoderms are also known for their ability to regenerate lost body parts, and some species can even undergo asexual reproduction through fragmentation. They play important ecological roles in marine ecosystems, including grazing on algae and other organisms, breaking down organic matter, and serving as prey for larger animals.

Artiodactyla is an order of mammals that includes even-toed ungulates, or hooved animals, with an odd number of toes. This group includes animals such as pigs, peccaries, hippos, camels, deer, giraffes, antelopes, and ruminants like cattle, sheep, and goats. The primary identifying feature of Artiodactyls is the presence of a pair of weight-bearing toes located in the middle of the foot, with the other toes being either reduced or absent. This arrangement provides stability and adaptability for these animals to thrive in various habitats worldwide.

An archaeal genome refers to the complete set of genetic material or DNA present in an archaea, a single-celled microorganism that is found in some of the most extreme environments on Earth. The genome of an archaea contains all the information necessary for its survival, including the instructions for building proteins and other essential molecules, as well as the regulatory elements that control gene expression.

Archaeal genomes are typically circular in structure and range in size from about 0.5 to over 5 million base pairs. They contain genes that are similar to those found in bacteria and eukaryotes, as well as unique genes that are specific to archaea. The study of archaeal genomes has provided valuable insights into the evolutionary history of life on Earth and has helped scientists understand the adaptations that allow these organisms to thrive in such harsh environments.

Dictyosteliida is a taxonomic group of social amoebae, also known as cellular slime molds. These are single-celled organisms that can aggregate under certain conditions to form multicellular structures. The aggregation is mediated by a network of signaling pathways and results in the formation of a migrating slug, which then differentiates into a fruiting body containing resistant spores.

Dictyosteliida are found in various environments, including soil, leaf litter, and decaying plant material. They play important roles in nutrient cycling and decomposition. The genus Dictyostelium is the best-studied group within this taxon, with Dictyostelium discoideum being a model organism for studying cellular differentiation, signal transduction, and other biological processes.

Alphaproteobacteria is a class of proteobacteria, a group of gram-negative bacteria. This class includes a diverse range of bacterial species that can be found in various environments, such as soil, water, and the surfaces of plants and animals. Some notable members of Alphaproteobacteria include the nitrogen-fixing bacteria Rhizobium and Bradyrhizobium, which form symbiotic relationships with the roots of leguminous plants, as well as the pathogenic bacteria Rickettsia, which are responsible for causing diseases such as typhus and Rocky Mountain spotted fever.

The Alphaproteobacteria class is further divided into several orders, including Rhizobiales, Rhodobacterales, and Caulobacterales. These orders contain a variety of bacterial species that have different characteristics and ecological roles. For example, members of the order Rhizobiales are known for their ability to fix nitrogen, while members of the order Rhodobacterales include photosynthetic bacteria that can use light as an energy source.

Overall, Alphaproteobacteria is a diverse and important group of bacteria that play various roles in the environment and in the health of plants and animals.

I'm sorry for any confusion, but "Rhizaria" is not a term used in medical definition. It is a taxonomic group in biology that includes various unicellular and multicellular organisms such as foraminifera, radiolarians, and some amoebae. These organisms are often found in marine environments and can be important contributors to marine sediments and food webs. They are not typically relevant to medical definitions or human health.

"Body size" is a general term that refers to the overall physical dimensions and proportions of an individual's body. It can encompass various measurements, including height, weight, waist circumference, hip circumference, blood pressure, and other anthropometric measures.

In medical and public health contexts, body size is often used to assess health status, risk factors for chronic diseases, and overall well-being. For example, a high body mass index (BMI) may indicate excess body fat and increase the risk of conditions such as diabetes, hypertension, and cardiovascular disease. Similarly, a large waist circumference or high blood pressure may also be indicators of increased health risks.

It's important to note that body size is just one aspect of health and should not be used as the sole indicator of an individual's overall well-being. A holistic approach to health that considers multiple factors, including diet, physical activity, mental health, and social determinants of health, is essential for promoting optimal health outcomes.

"Rodentia" is not a medical term, but a taxonomic category in biology. It refers to the largest order of mammals, comprising over 40% of all mammal species. Commonly known as rodents, this group includes mice, rats, hamsters, gerbils, guinea pigs, squirrels, prairie dogs, capybaras, beavers, and many others.

While "Rodentia" itself is not a medical term, certain conditions or issues related to rodents can have medical implications. For instance, rodents are known to carry and transmit various diseases that can affect humans, such as hantavirus, leptospirosis, salmonellosis, and lymphocytic choriomeningitis (LCMV). Therefore, understanding the biology and behavior of rodents is important in the context of public health and preventive medicine.

Xenarthra is not a medical term, but a taxonomic category in biology. It refers to the order of mammals that consists of anteaters, sloths, and armadillos. These animals are characterized by their unique skeletal and dental structures, including extra joints between their vertebrae and specialized teeth for grinding or tearing food.

While Xenarthra is not a medical term, it is worth noting that these animals have some unique adaptations that can impact their health and veterinary care. For example, anteaters have an extremely long and sticky tongue to eat ants and termites, which can make dental care challenging. Sloths have a slow metabolism and spend most of their time hanging upside down in trees, which can affect their digestion and musculoskeletal health. Armadillos are known to be carriers of leprosy, which can impact human health in certain areas where they are common.

Protein sequence analysis is the systematic examination and interpretation of the amino acid sequence of a protein to understand its structure, function, evolutionary relationships, and other biological properties. It involves various computational methods and tools to analyze the primary structure of proteins, which is the linear arrangement of amino acids along the polypeptide chain.

Protein sequence analysis can provide insights into several aspects, such as:

1. Identification of functional domains, motifs, or sites within a protein that may be responsible for its specific biochemical activities.
2. Comparison of homologous sequences from different organisms to infer evolutionary relationships and determine the degree of similarity or divergence among them.
3. Prediction of secondary and tertiary structures based on patterns of amino acid composition, hydrophobicity, and charge distribution.
4. Detection of post-translational modifications that may influence protein function, localization, or stability.
5. Identification of protease cleavage sites, signal peptides, or other sequence features that play a role in protein processing and targeting.

Some common techniques used in protein sequence analysis include:

1. Multiple Sequence Alignment (MSA): A method to align multiple protein sequences to identify conserved regions, gaps, and variations.
2. BLAST (Basic Local Alignment Search Tool): A widely-used tool for comparing a query protein sequence against a database of known sequences to find similarities and infer function or evolutionary relationships.
3. Hidden Markov Models (HMMs): Statistical models used to describe the probability distribution of amino acid sequences in protein families, allowing for more sensitive detection of remote homologs.
4. Protein structure prediction: Methods that use various computational approaches to predict the three-dimensional structure of a protein based on its amino acid sequence.
5. Phylogenetic analysis: The construction and interpretation of evolutionary trees (phylogenies) based on aligned protein sequences, which can provide insights into the historical relationships among organisms or proteins.

Population Genetics is a subfield of genetics that deals with the genetic composition of populations and how this composition changes over time. It involves the study of the frequency and distribution of genes and genetic variations in populations, as well as the evolutionary forces that contribute to these patterns, such as mutation, gene flow, genetic drift, and natural selection.

Population genetics can provide insights into a wide range of topics, including the history and relationships between populations, the genetic basis of diseases and other traits, and the potential impacts of environmental changes on genetic diversity. This field is important for understanding evolutionary processes at the population level and has applications in areas such as conservation biology, medical genetics, and forensic science.

I'm sorry for any confusion, but "Hymenoptera" is not a medical term. It is a scientific classification in biology, specifically referring to an order of insects that includes sawflies, bees, ants, and wasps. These insects are characterized by having two pairs of membranous wings (except for some species that have only one pair or are wingless) and a slender waist. Some people may have allergic reactions to the venom of stinging Hymenoptera, such as bees and wasps, which can cause medical issues. However, "Hymenoptera" itself is not a medical term.

Lagomorpha is an order of mammals that includes rabbits, hares, and pikas. They are herbivores with large incisors in the front of their mouths and a second pair of smaller incisors behind them. Lagomorpha is distinguished from other orders by its unique dental characteristics and the presence of two pairs of upper incisors. These animals are known for their high reproductive rates and are found worldwide, except for Antarctica and some islands.

Annelida is a phylum of bilaterally symmetrical, segmented animals that includes earthworms, leeches, and marine polychaetes (bristle worms). The name "Annelida" comes from the Latin word "annellus," meaning "little ring," which refers to the distinct segments found in these animals.

Each segment in annelids contains a pair of bundled nerves called the ventral nerve cord, and many also contain circular and longitudinal muscles that enable the animal to move by contracting and relaxing these muscles in a wave-like motion. Some annelids have specialized segments for functions such as reproduction or respiration.

Annelids are primarily aquatic animals, although some terrestrial species like earthworms have evolved to live on land. They vary in size from tiny marine worms that are only a few millimeters long to large marine polychaetes that can reach over a meter in length.

Annelids are important decomposers and help break down dead organic matter, returning nutrients to the soil or water. Some species of annelids are also parasitic, feeding on the blood or tissues of other animals. Overall, annelids play a crucial role in many aquatic and terrestrial ecosystems.

Bacterial proteins are a type of protein that are produced by bacteria as part of their structural or functional components. These proteins can be involved in various cellular processes, such as metabolism, DNA replication, transcription, and translation. They can also play a role in bacterial pathogenesis, helping the bacteria to evade the host's immune system, acquire nutrients, and multiply within the host.

Bacterial proteins can be classified into different categories based on their function, such as:

1. Enzymes: Proteins that catalyze chemical reactions in the bacterial cell.
2. Structural proteins: Proteins that provide structural support and maintain the shape of the bacterial cell.
3. Signaling proteins: Proteins that help bacteria to communicate with each other and coordinate their behavior.
4. Transport proteins: Proteins that facilitate the movement of molecules across the bacterial cell membrane.
5. Toxins: Proteins that are produced by pathogenic bacteria to damage host cells and promote infection.
6. Surface proteins: Proteins that are located on the surface of the bacterial cell and interact with the environment or host cells.

Understanding the structure and function of bacterial proteins is important for developing new antibiotics, vaccines, and other therapeutic strategies to combat bacterial infections.

Dinoflagellida is a large group of mostly marine planktonic protists, many of which are bioluminescent. Some dinoflagellates are responsible for harmful algal blooms (HABs), also known as "red tides," which can produce toxins that affect marine life and human health.

Dinoflagellates are characterized by two flagella, or whip-like structures, that they use for movement. They have complex cell structures, including a unique structure called the nucleomorph, which is the remnant of a former endosymbiotic event where another eukaryotic cell was engulfed and became part of the dinoflagellate's cell.

Dinoflagellates are important contributors to the marine food chain, serving as both primary producers and consumers. Some species form symbiotic relationships with other marine organisms, such as corals, providing them with nutrients in exchange for protection and other benefits.

I'm sorry for any confusion, but the term "Africa" actually refers to a continent, not a medical condition or concept. Africa is the second-largest continent in the world, consisting of 54 countries and a wide range of diverse ethnic groups, cultures, languages, and landscapes. It is home to a vast array of wildlife, including many species that are not found anywhere else in the world. If you have any questions about Africa's geography, history, or culture, I would be happy to try to help answer them!

Genetic markers are specific segments of DNA that are used in genetic mapping and genotyping to identify specific genetic locations, diseases, or traits. They can be composed of short tandem repeats (STRs), single nucleotide polymorphisms (SNPs), restriction fragment length polymorphisms (RFLPs), or variable number tandem repeats (VNTRs). These markers are useful in various fields such as genetic research, medical diagnostics, forensic science, and breeding programs. They can help to track inheritance patterns, identify genetic predispositions to diseases, and solve crimes by linking biological evidence to suspects or victims.

Genetic selection, also known as natural selection, is a fundamental mechanism of evolution. It refers to the process by which certain heritable traits become more or less common in a population over successive generations due to differential reproduction of organisms with those traits.

In genetic selection, traits that increase an individual's fitness (its ability to survive and reproduce) are more likely to be passed on to the next generation, while traits that decrease fitness are less likely to be passed on. This results in a gradual change in the distribution of traits within a population over time, leading to adaptation to the environment and potentially speciation.

Genetic selection can occur through various mechanisms, including viability selection (differential survival), fecundity selection (differences in reproductive success), and sexual selection (choices made by individuals during mating). The process of genetic selection is driven by environmental pressures, such as predation, competition for resources, and changes in the availability of food or habitat.

Porifera, also known as sponges, is a phylum of multicellular aquatic organisms characterized by having pores in their bodies. These pores allow water to circulate through the body, bringing in food and oxygen while expelling waste products. Sponges do not have true tissues or organs; instead, they are composed of specialized cells that perform specific functions. They are generally sessile (non-mobile) and live attached to rocks, coral reefs, or other underwater structures. Some species can be quite large, while others are microscopic in size. Sponges have a long fossil record dating back over 500 million years and play important roles in marine ecosystems as filter feeders and habitat providers for many other marine organisms.

I'm sorry for any confusion, but "North America" is not a medical term. It is a geographical term that refers to the third largest continent in the world, which includes countries such as the United States, Canada, and Mexico, among others. If you have any questions related to medical terminology or health topics, I'd be happy to help with those!

I'm sorry for any confusion, but "Markov Chains" is a term from the field of mathematics and probability theory, not medicine. Markov Chains are mathematical systems that undergo transitions from one state to another according to certain probabilistic rules. They are named after Russian mathematician Andrey Markov. These chains are used in various fields, including computer science, physics, economics, and engineering, but not commonly in medical definitions or contexts.

Introns are non-coding sequences of DNA that are present within the genes of eukaryotic organisms, including plants, animals, and humans. Introns are removed during the process of RNA splicing, in which the initial RNA transcript is cut and reconnected to form a mature, functional RNA molecule.

After the intron sequences are removed, the remaining coding sequences, known as exons, are joined together to create a continuous stretch of genetic information that can be translated into a protein or used to produce non-coding RNAs with specific functions. The removal of introns allows for greater flexibility in gene expression and regulation, enabling the generation of multiple proteins from a single gene through alternative splicing.

In summary, introns are non-coding DNA sequences within genes that are removed during RNA processing to create functional RNA molecules or proteins.

Ecology is not a medical term, but rather a term used in the field of biology. It refers to the study of the relationships between living organisms and their environment. This includes how organisms interact with each other and with their physical surroundings, such as climate, soil, and water. Ecologists may study the distribution and abundance of species, the flow of energy through an ecosystem, and the effects of human activities on the environment. While ecology is not a medical field, understanding ecological principles can be important for addressing public health issues related to the environment, such as pollution, climate change, and infectious diseases.

"Viridiplantae" is a taxonomic term used in the classification of plant life. It is a clade that includes all organisms that scientists refer to as "green plants." This group consists of two distinct lineages: the Chlorophyta (green algae) and the Streptophyta (land plants and charophyte algae).

Members of Viridiplantae are characterized by the presence of chloroplasts containing chlorophylls a and b, which gives them their green color. These chloroplasts originate from cyanobacteria through endosymbiosis, a process in which a eukaryotic cell engulfs a prokaryotic cell and then keeps it alive inside itself.

The Viridiplantae clade is significant because it includes the evolutionary ancestors of land plants, which evolved from aquatic green algae approximately 500 million years ago. This group contains a wide variety of organisms, ranging from simple, single-celled algae to complex, multicellular terrestrial plants.

I'm sorry for any confusion, but "wasps" is not a term that has a specific medical definition. Wasps are a type of insect in the order Hymenoptera, and some people can have allergic reactions to their stings. However, there is no medical condition or disease specifically associated with wasps. If you have any specific medical concerns or questions, I would be happy to try to help if I can!

The "Americas" is a term used to refer to the combined landmasses of North America and South America, which are separated by the Isthmus of Panama. The Americas also include numerous islands in the Caribbean Sea, Atlantic Ocean, and Pacific Ocean. This region is home to a diverse range of cultures, ecosystems, and historical sites. It is named after the Italian explorer Amerigo Vespucci, who was one of the first Europeans to explore and map parts of South America in the late 15th century.

Platyrrhini is a biological term that refers to a New World monkey group, primarily characterized by their wide, flattened noses. The name "Platyrrhini" comes from the Greek words "platys," meaning flat or broad, and "rhinos," meaning nose.

This paraphyletic group includes five families: Cebidae (capuchin monkeys, squirrel monkeys, and titi monkeys), Aotidae (night monkeys), Pitheciidae (tamarins, marmosets, sakis, and uakaris), Atelidae (spider monkeys, howler monkeys, woolly monkeys, and muriquis), and Callitrichidae (marmosets and tamarins).

Platyrrhini monkeys are native to Central and South America. They have a diverse range of physical characteristics, diets, and behaviors. Some notable differences between Platyrrhini and Old World monkeys include their opposable thumbs, claws instead of nails on some digits, and a unique digestive system that allows them to metabolize various plant materials efficiently.

There doesn't seem to be a specific medical definition for "DNA, protozoan" as it is simply a reference to the DNA found in protozoa. Protozoa are single-celled eukaryotic organisms that can be found in various environments such as soil, water, and the digestive tracts of animals.

Protozoan DNA refers to the genetic material present in these organisms. It is composed of nucleic acids, including deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), which contain the instructions for the development, growth, and reproduction of the protozoan.

The DNA in protozoa, like in other organisms, is made up of two strands of nucleotides that coil together to form a double helix. The four nucleotide bases that make up protozoan DNA are adenine (A), thymine (T), guanine (G), and cytosine (C). These bases pair with each other to form the rungs of the DNA ladder, with A always pairing with T and G always pairing with C.

The genetic information stored in protozoan DNA is encoded in the sequence of these nucleotide bases. This information is used to synthesize proteins, which are essential for the structure and function of the organism's cells. Protozoan DNA also contains other types of genetic material, such as regulatory sequences that control gene expression and repetitive elements with no known function.

Understanding the DNA of protozoa is important for studying their biology, evolution, and pathogenicity. It can help researchers develop new treatments for protozoan diseases and gain insights into the fundamental principles of genetics and cellular function.

I'm sorry for any confusion, but "Programming, Linear" is not a recognized medical term or concept. The term "linear programming" comes from the field of mathematics and computer science, and it refers to a method used to find the optimal solution(s) to a problem with certain constraints, where the objective function and constraints are linear.

If you have any questions related to medicine or healthcare, I'd be happy to try to help answer them for you!

A mole (nevus) is a benign growth on the skin that is usually brown or black. Moles can appear anywhere on the body, alone or in groups. Most adults have between 10 and 40 moles. They typically appear during childhood and adolescence. Some moles may change over time, possibly becoming raised and/or changing color. It's important to keep an eye on moles and see a healthcare provider if any changes are noticed, as melanoma, a type of skin cancer, can develop from moles.

It is also worth noting that there are different types of moles including congenital nevi (moles present at birth), dysplastic nevi (atypical moles) and acquired nevi (moles that appear after birth). Dysplastic nevi are larger than average and irregular in shape, with color variations. They are more likely to develop into melanoma than regular moles.

"Beetles" is not a medical term. It is a common name used to refer to insects belonging to the order Coleoptera, which is one of the largest orders in the class Insecta. Beetles are characterized by their hardened forewings, known as elytra, which protect their hind wings and body when not in use for flying.

There are many different species of beetles found all over the world, and some can have an impact on human health. For example, certain types of beetles, such as bed bugs and carpet beetles, can cause skin irritation and allergic reactions in some people. Other beetles, like the Colorado potato beetle, can damage crops and lead to economic losses for farmers. However, it is important to note that most beetles are not harmful to humans and play an essential role in ecosystems as decomposers and pollinators.

A chloroplast genome is the entire genetic material that is present in the chloroplasts, which are organelles found in plant cells and some protists. The chloroplast genome is circular in shape and contains about 120-160 kilobases (kb) of DNA. It encodes for a small number of proteins, ribosomal RNAs, and transfer RNAs that are required for the function of the chloroplasts, particularly in photosynthesis. The chloroplast genome is usually inherited maternally, meaning it is passed down from the mother to her offspring.

The chloroplast genome is relatively simple compared to the nuclear genome, which contains many more genes and regulatory elements. However, most of the proteins required for chloroplast function are actually encoded in the nucleus and imported into the chloroplasts. The study of chloroplast genomes can provide insights into the evolutionary history of plants and their photosynthetic ancestors.

Musaceae is a botanical term that refers to a family of tropical plants known for their large, attractive flowers and fleshy fruits. The family includes several genera, but the most well-known are Musa (bananas and plantains) and Ensete (false bananas). These plants are native to Southeast Asia and Africa's tropical regions.

The fruit of these plants, also known as musa, is widely consumed and cultivated throughout the world for its sweet taste and high nutritional value. Bananas are a great source of dietary fiber, vitamin C, potassium, and vitamin B6. The plant's stem and leaves are also used in various traditional medicinal practices in different cultures.

"Dolphins" is a common name that refers to several species of marine mammals belonging to the family Delphinidae, within the larger group Cetacea. Dolphins are known for their intelligence, social behavior, and acrobatic displays. They are generally characterized by a streamlined body, a prominent dorsal fin, and a distinctive "smiling" expression created by the curvature of their mouths.

Although "dolphins" is sometimes used to refer to all members of the Delphinidae family, it is important to note that there are several other families within the Cetacea order, including porpoises and whales. Therefore, not all small cetaceans are dolphins.

Some examples of dolphin species include:

1. Bottlenose Dolphin (Tursiops truncatus) - This is the most well-known and studied dolphin species, often featured in aquariums and marine parks. They have a robust body and a prominent, curved dorsal fin.
2. Common Dolphin (Delphinus delphis) - These dolphins are characterized by their hourglass-shaped color pattern and distinct, falcate dorsal fins. There are two subspecies: the short-beaked common dolphin and the long-beaked common dolphin.
3. Spinner Dolphin (Stenella longirostris) - Known for their acrobatic behavior, spinner dolphins have a slender body and a long, thin beak. They are named for their spinning jumps out of the water.
4. Risso's Dolphin (Grampus griseus) - These dolphins have a unique appearance, with a robust body, a prominent dorsal fin, and a distinctive, scarred skin pattern caused by social interactions and encounters with squid, their primary food source.
5. Orca (Orcinus orca) - Also known as the killer whale, orcas are the largest dolphin species and are highly intelligent and social predators. They have a distinctive black-and-white color pattern and a prominent dorsal fin.

In medical terminology, "dolphins" do not have a specific relevance, but they can be used in various contexts such as therapy, research, or education. For instance, dolphin-assisted therapy is an alternative treatment that involves interactions between patients and dolphins to improve psychological and physical well-being. Additionally, marine biologists and researchers study dolphin behavior, communication, and cognition to understand their complex social structures and intelligence better.

Host-parasite interactions refer to the relationship between a parasitic organism (the parasite) and its host, which can be an animal, plant, or human body. The parasite lives on or inside the host and derives nutrients from it, often causing harm in the process. This interaction can range from relatively benign to severe, depending on various factors such as the species of the parasite, the immune response of the host, and the duration of infection.

The host-parasite relationship is often categorized based on the degree of harm caused to the host. Parasites that cause little to no harm are called commensals, while those that cause significant damage or disease are called parasitic pathogens. Some parasites can even manipulate their hosts' behavior and physiology to enhance their own survival and reproduction, leading to complex interactions between the two organisms.

Understanding host-parasite interactions is crucial for developing effective strategies to prevent and treat parasitic infections, as well as for understanding the ecological relationships between different species in natural ecosystems.

The cell nucleus is a membrane-bound organelle found in the eukaryotic cells (cells with a true nucleus). It contains most of the cell's genetic material, organized as DNA molecules in complex with proteins, RNA molecules, and histones to form chromosomes.

The primary function of the cell nucleus is to regulate and control the activities of the cell, including growth, metabolism, protein synthesis, and reproduction. It also plays a crucial role in the process of mitosis (cell division) by separating and protecting the genetic material during this process. The nuclear membrane, or nuclear envelope, surrounding the nucleus is composed of two lipid bilayers with numerous pores that allow for the selective transport of molecules between the nucleoplasm (nucleus interior) and the cytoplasm (cell exterior).

The cell nucleus is a vital structure in eukaryotic cells, and its dysfunction can lead to various diseases, including cancer and genetic disorders.

One such example is that of Incomplete Directed Perfect Phylogeny. This concept involves utilizing perfect phylogenies with ... Character state matrices An example of a character matrix that can be depicted as a perfect phylogeny Perfect phylogeny is a ... "Clonality Inference in Tumors Using Phylogeny" (CITUP) Github for "Exact inference under the perfect phylogeny model" (EXACT) ... Inferring a phylogeny from noisy VAF data under the PPM is a hard problem. Most inference tools include some heuristic step to ...
Research on harvestman phylogeny (that is, the phylogenetic tree) is in a state of flux. While some families are clearly ... There is not yet a proposed phylogeny for the whole group of Laniatores, although some families have been researched in this ... Garwood, Russell J.; Dunlop, Jason A.; Knecht, Brian J.; Hegna, Thomas A. (2017). "The phylogeny of fossil whip spiders". BMC ... The Dyspnoi are probably the best studied harvestman group regarding phylogeny. They are clearly monophyletic, and divided into ...
... phylogeny might shed more light on the pre-history of an organism. The term phylogeny derives from the Greek terms phyle (φυλή ... Phylogeny in psychoanalysis is the study of the whole family or species of an organism in order to better understand the pre- ...
Molecular studies have attempted to infer the phylogeny of this clade, resulting in phylogenies which have a limited amount of ... Phylogeny of Malacostraca is the evolutionary relationships of the largest of the six classes of crustaceans, containing about ... To resolve a well-supported eumalacostracan phylogeny and obtain a robust tree, it will be necessary to look beyond the most ... The major feature that emerges from the picture of the phylogeny of the Malacostraca is that their diversity has resulted in ...
Pterosauria @ Mikko's Phylogeny Archive Kellner, A. W. A., (2003): Pterosaur phylogeny and comments on the evolutionary history ... This phylogeny of pterosaurs entails the various phylogenetic trees used to classify pterosaurs throughout the years and ... Pterosaur phylogeny is currently highly contested and several hypotheses are presented below. The matrix includes 19 pterosaur ... A paper focusing on the pterosaur phylogeny (Andres) was published in a book named "The Pterosauria". An updated and more ...
The Pteridophyte Phylogeny Group (PPG) is an informal international group of systematic botanists who collaborate to establish ... The classification was based on a consensus phylogeny, shown below to the level of order. The very large order Polypodiales was ...
The Angiosperm Phylogeny Website (or APweb) is a website dedicated to research on angiosperm phylogeny and taxonomy. The site ... Peter F. Stevens is a member of the Angiosperm Phylogeny Group (APG). The taxonomy presented is broadly based on the work of ... "Angiosperm phylogeny: A chart of flowering plant families". Wikimedia Commons has media related to APWebsite. Official website ... Stevens, Peter F. (2006). "The angiosperm phylogeny Website - a tool for reference and teaching in a time of change". ...
2001], Angiosperm Phylogeny Website, retrieved 11 June 2016 Cole, Theodor C.H. (2015), "Angiosperm Phylogeny Group (APG) in ... 10.1111/j.1095-8339.2009.00996.x Angiosperm Phylogeny Group IV (2016). "An update of the Angiosperm Phylogeny Group ... The Angiosperm Phylogeny Group (APG) is an informal international group of systematic botanists who collaborate to establish a ... Peter Stevens, one of the authors of all four of the APG papers, maintains a web site, the Angiosperm Phylogeny Website (APWeb ...
... is Stephen Jay Gould's first technical book. He wrote that Ernst Mayr had suggested in passing that he ... Ontogeny and Phylogeny is a 1977 book on evolution by Stephen Jay Gould, in which the author explores the relationship between ... Gould's hope was to show that the relationship between ontogeny and phylogeny is fundamental to evolution, and at its heart is ... "Ontogeny and phylogeny". WorldCat. Retrieved 21 September 2021. Hall, B. K. (2003). "Evo-Devo: evolutionary developmental ...
Phylogeny estimation using distance methods has produced a number of controversies. UPGMA assumes an ultrametric tree (a tree ... Distance matrices are used in phylogeny as non-parametric distance methods and were originally applied to phenetic data using a ... Error resulting from any characteristic of that branch that might confound phylogeny (stochastic variability, change in ... Felsenstein J. (2004). Inferring Phylogenies Sinauer Associates: Sunderland, MA. Fitch WM; Margoliash E (1967). "Construction ...
Some of these include: Inference of phylogenies. Inference and evaluation of uncertainty of phylogenies. Inference of ancestral ... Bayesian inference of phylogeny combines the information in the prior and in the data likelihood to create the so-called ... The results of the Bayesian analysis of a phylogeny are directly correlated to the model of evolution chosen so it is important ... Although considered by many to be the best approach to inferring phylogenies from a theoretical point of view, ML is ...
... generates a phylogenetic tree based on an observed matrix of pairwise genetic distances ... William H.E. Day, Computational complexity of inferring phylogenies from dissimilarity matrices, Bulletin of Mathematical ...
Struck TH (2019). "Phylogeny". In Purschke G, Böggemann M, Westheide W (eds.). Handbook of Zoology: Annelida. Vol. 1: Annelida ... Struck, T.H.; Schult, N.; Kusen, T.; Hickman, E.; Bleidorn, C.; McHugh, D.; Halanych, K.M. (5 April 2007). "Annelid phylogeny ... Halanych, K.M. (2004). "The new view of animal phylogeny" (PDF). Annual Review of Ecology, Evolution, and Systematics. 35: 229- ... Jenner, R. A. (2006). "Challenging received wisdoms: Some contributions of the new microscopy to the new animal phylogeny". ...
The phylogeny of polychaetes is slowly being resolved. Errantia and Sedentaria are the two biggest clades of polychaetes, and ... Weigert A, Bleidorn C (2016). "Current status of annelid phylogeny". Org Divers Evol. 16: 345-362. doi:10.1007/s13127-016-0265- ... "Phylogeny". In Purschke G, Böggemann M, Westheide W (eds.). Handbook of Zoology: Annelida. Vol. 1: Annelida Basal Groups and ...
Struck TH (2019). "Phylogeny". In Purschke G, Böggemann M, Westheide W (eds.). Handbook of Zoology: Annelida. Vol. 1: Annelida ... doi:10.1111/j.1439-0469.2011.00640.x. Weigert A, Bleidorn C (2016). "Current status of annelid phylogeny". Org Divers Evol. 16 ...
The result of these analyses is a phylogeny (also known as a phylogenetic tree) - a diagrammatic hypothesis about the history ... Phylogeny Phylogenetics Taxonomy Cladistics Ontogeny Evolution Mayr E. (2005). Das ist Evolution. München: Goldmann. ISBN 3-442 ... The degree to which taxonomies depend on phylogenies (or classification depends on evolutionary development) differs depending ... ISBN 978-0-520-23693-6. "phylogeny". Biology online. Retrieved 2013-02-15. "clade". Online Etymology Dictionary. Columbia ...
Struck TH (2019). "Phylogeny". In Purschke G, Böggemann M, Westheide W (eds.). Handbook of Zoology: Annelida. Vol. 1: Annelida ...
"Phylogeny". Data from: A new durophagous stem cheloniid turtle from the lower Paleocene of Cabinda, Angola (Data Set). Dryad ...
"Phylogeny". zmuc.dk. 14 December 2005. Archived from the original on 24 December 2018. Retrieved 3 March 2018. "Limnognathia ...
... one of semantics rather than of phylogeny. Both express the same phylogeny, but the former emphasizes the phylogenetic ... "phylogeny". Biology online. Retrieved 15 February 2013. Latreille, P.A. (1804). Nouveau Dictionnaire à Histoire Naturelle, xxiv ... Kevin de Queiroz & Jacques Gauthier (1990). "Phylogeny as a central principle in taxonomy: phylogenetic definitions of taxon ... Grant, Verne (1998). "Primary Classification and Phylogeny of the Polemoniaceae, with Comments on Molecular Cladistics". ...
phylogeny. Ent., 1:1-56. Enderlein, G. (1928b), Sarcophgiden-Studien II. Konowia, 7:147-153. Enderlein, G. (1936), 22. Ordnung ...
The phylogeny of polychaetes is slowly being resolved. Sedentaria and Errantia are the two biggest clades of polychaetes, and ... Struck TH (2019). "Phylogeny". In Purschke G, Böggemann M, Westheide W (eds.). Handbook of Zoology: Annelida. Vol. 1: Annelida ... Weigert A, Bleidorn C (2016). "Current status of annelid phylogeny". Org Divers Evol. 16: 345-362. doi:10.1007/s13127-016-0265- ...
The term "phylogeny" derives from the German Phylogenie, introduced by Haeckel in 1866, and the Darwinian approach to ... "phylogeny". Biology online. Retrieved 15 February 2013. Itzik, Peer (1 January 2001). "Phylogenetic Trees". www.cs.tau.ac.il. ... Phylogeny reconstruction. In D. M. Hillis and G. Moritz (eds.), Molecular Systematics, pages 411-501. Sinauer Associates, ... It was often expressed as "ontogeny recapitulates phylogeny", i.e. the development of a single organism during its lifetime, ...
Gauthier, J.A.; Cannatella, D.; Queiroz, K.; Kluge, A.G. & Rowe, T. (1989). "Tetrapod phylogeny". In Fernholm, K. Bremer, & ... Herrerasaurus has been classified as an early saurischian in most of the phylogenies on the origin and early evolution of ... a reassessment of dinosaur origin and phylogeny". Journal of Systematic Palaeontology. 8 (3): 371-425. doi:10.1080/ ...
On another level, one can map the horizontal gene transfer processes, by determining the phylogeny of the individual genes ... "Phylogeny Programs". Seattle: University of Washington. Retrieved 21 January 2010. O'Neil, Dennis (1998-2008). "Classification ... Mythological phylogenies constructed with mythemes clearly support low horizontal transmissions (borrowings), historical ( ... Historical linguistics: Cladistic methods have been used to reconstruct the phylogeny of languages using linguistic features. ...
doi:10.11646/zootaxa.1734.1.5. "Elasmobranch Phylogeny". ResearchGate. Retrieved 2019-03-03. "The Rays of the World project - ...
"FlyBase phylogeny". Retrieved 24 August 2019. v t e (Articles with short description, Short description matches Wikidata, ...
January 2001). "Analysis of partial Glomales SSU rRNA gene sequences: implications for primer design and phylogeny". Mycol. Res ... Schüßler, Arthur (15 August 2011). "Glomeromycota phylogeny". www.lrz-muenchen.de. Archived from the original on 2012-05-29. ... December 2001). "A new fungal phylum, the Glomeromycota: phylogeny and evolution". Mycol. Res. 105 (12): 1413-1421. doi:10.1017 ... Redeker, D. (2002). "Molecular identification and phylogeny of arbuscular mycorrhizal fungi". Plant and Soil. 244: 67-73. doi: ...
New views on phylogeny, form and function. Cambridge University Press. pp. 25-63. doi:10.1017/CBO9781139193436.003. ISBN ... "Mammal Phylogeny - Placentals", Szalay, F. S., M. J. Novacek and M. C. McKenna (eds.). ISBN 978-0-387-97853-6 K. D. Rose, A. E ... "Phylogeny of the Carnivora and Carnivoramorpha, and the use of the fossil record to enhance understanding of evolutionary ... Fox Phylogeny. Vertebrate Evolution - Fall 2005, The Evergreen State College, Olympia, WA. Wesley-Hunt, G. D.; Werdelin, L. ( ...
Crompton, Alfred W.; Luo, Zhexi (1993). Mammal Phylogeny. New York, NY: Springer New York. pp. 30-44. doi:10.1007/978-1-4615- ... McNab, Brian K. (January 1978). "The Evolution of Endothermy in the Phylogeny of Mammals". The American Naturalist. 112 (983): ... Some authors have challenged the phylogeny represented by the cladogram above. They exclude the multituberculates from the ... Szalay FS, Trofimov BA (1996). "The Mongolian Late Cretaceous Asiatherium, and the early phylogeny and paleobiogeography of ...
One such example is that of Incomplete Directed Perfect Phylogeny. This concept involves utilizing perfect phylogenies with ... Character state matrices An example of a character matrix that can be depicted as a perfect phylogeny Perfect phylogeny is a ... "Clonality Inference in Tumors Using Phylogeny" (CITUP) Github for "Exact inference under the perfect phylogeny model" (EXACT) ... Inferring a phylogeny from noisy VAF data under the PPM is a hard problem. Most inference tools include some heuristic step to ...
... Gayle Philip1, James McInerney2. [email protected], National University of Ireland, ...
This TU biologist prefers fish over people and canvas over cameras By Jason Barnes My comfort zone is not in front of a camera. Id rather be camped out with my field crew planning a season of conservation work and talking about Lahontan cutthroat trout. My crew has historically been my family for the summer, and they are some of the very…. ...
Home / Our science / Research / Projects / Phylogeny and DNA taxonomy of derived liverworts ...
To resolve the phylogeny of certain mitochondrial DNA (mtDNA) haplogroups in eastern Europe and estimate their evolutionary age ... Mitochondrial DNA phylogeny in Eastern and Western Slavs Mol Biol Evol. 2008 Aug;25(8):1651-8. doi: 10.1093/molbev/msn114. Epub ... To resolve the phylogeny of certain mitochondrial DNA (mtDNA) haplogroups in eastern Europe and estimate their evolutionary age ...
706-746 Phylogeny and classification of whirligig beetles (Coleoptera: Gyrinidae): relaxed-clock model outperforms parsimony and ...
Among-Amphidorini phylogeny continued. Topology shown is the same as Fig. 2 with the core-eleodes clade expanded. Branches ... Among-Amphidorini phylogeny continued. Topology shown is the same as Fig. 2 with the metablapylis group expanded. Branches ... The goal of this study is to produce a densely sampled species-level phylogeny to test the monophyly of the Amphidorini at the ... To illuminate this phylogeny/classification gap (Franz 2005), Table 2 summarizes the current taxonomic classification and the ...
The rationale for this is that the perfect phylogeny near a disease affecting mutation should provide more information about ... can allow the inclusion of incompatibility markers in order to enlarge the regions prior to estimating their phylogeny. ... Bardel C, Danjean V, Hugot JP, Darlu P, Génin E: On the use of haplotype phylogeny to detect disease susceptibility loci. BMC ... The inferred perfect phylogeny is essentially unrooted, and we have no knowledge of where the "real" root should be placed; we ...
Information, guidance and support for readers interested in applying the principles of The Blood Type Diet as outlined by The New York Times best-selling author Dr. Peter DAdamo.
Diversity, Phylogeny & Evolution in the Monocotyledons (Paperback). Imprint: Aarhus University Press Pages: 663. Illustrations ... Youll be £40.00 closer to your next £10.00 credit when you purchase Diversity, Phylogeny & Evolution in the Monocotyledons. ...
The technical storage or access that is used exclusively for statistical purposes. The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you. ...
Phylogeny of Yellow Fever Virus, Uganda, 2016. Emerging Infectious Diseases. 2018;24(8):1598-1599. doi:10.3201/eid2408.180588. ... Hughes, H. R., Kayiwa, J., Mossel, E. C., Lutwama, J., Staples, J., & Lambert, A. J. (2018). Phylogeny of Yellow Fever Virus, ... Phylogeny of Yellow Fever Virus, Uganda, 2016. Volume 24, Number 8-August 2018 ... and phylogenies were generated with BEAST 1.8.4 (9), as previously described (7). ...
SIZE, EXTINCTION, SURVIVORSHIP AND PHYLOGENY IN FORAMINIFERA. MACLEOD, Norman, The Natural History Museum, Cromwell Road, ... Definitions of the Lilliput Effect leave the role of phylogeny ambiguous. This is unfortunate because size is heritable and ...
... Dataset homepage ... McCowin M F, Rouse G W, pensoft (2018). Phylogeny of hydrothermal vent Iphionidae, with the description of a new species ( ... McCowin, Marina F., Rouse, Greg W. (2018): Phylogeny of hydrothermal vent Iphionidae, with the description of a new species ( ... Phylogeny of hydrothermal vent Iphionidae, with the description of a new species (Aphroditiformia, Annelida). ZooKeys 779: 89- ...
The molecular phylogeny challenges current concepts of Sphingidae based on morphology, and provides a foundation for a new ... Conclusions/Significance Our study provides the first comprehensive phylogeny of one of the most conspicuous and well-studied ...
Molecular trait indicators: moving beyond phylogeny in arbuscular mycorrhizal ecology.. H.A. Gamper, M.G.A. van der Heijden, G. ... Gamper, H.A. ; van der Heijden, M.G.A. ; Kowalchuk, G.A. / Molecular trait indicators: moving beyond phylogeny in arbuscular ... Gamper, H. A., van der Heijden, M. G. A., & Kowalchuk, G. A. (2010). Molecular trait indicators: moving beyond phylogeny in ... Molecular trait indicators: moving beyond phylogeny in arbuscular mycorrhizal ecology. / Gamper, H.A.; van der Heijden, M.G.A ...
Ding, S., Li, X., Wang, N., Cameron, S. L., Mao, M., Wang, Y., Xi, Y. & Yang, D. (2015). The phylogeny and evolutionary ... The phylogeny and evolutionary timescale of muscoidea (diptera: brachycera: calyptratae) inferred from mitochondrial genomes. ...
Myosins of Babesia bovis: molecular characterisation, erythrocyte invasion, and phylogeny. A E Lew, A R Dluzewski, A M Johnson ... Myosins of Babesia bovis: molecular characterisation, erythrocyte invasion, and phylogeny. / Lew, A E; Dluzewski, A R; Johnson ... Myosins of Babesia bovis: molecular characterisation, erythrocyte invasion, and phylogeny. Cell Motility and the Cytoskeleton. ... Myosins of Babesia bovis: molecular characterisation, erythrocyte invasion, and phylogeny. In: Cell Motility and the ...
HILL, BRUCE FLEMING, "CLASSIFICATION AND PHYLOGENY IN THE SUBORDER EUPLOTINA (CILIOPHORA, HYPOTRICHIDA)" (1980). Doctoral ...
Roadmap to the study of gene and protein phylogeny and evolution-A practical guide. *Mark ... Roadmap to the study of gene and protein phylogeny and evolution-A practical guide}}, url = {{http://dx.doi.org/10.1371/journal ...
Data from: Shotgun mitogenomics across body size classes in a local assemblage of tropical Diptera: phylogeny, species ... phylogeny, species diversity and mitochondrial abundance spectrum [Dataset]. Dryad. https://doi.org/10.5061/dryad.nm948 ...
A phylogeny of Iguanidae. Pp. 283-367 in Phylogenetic Relationships of the Lizard Families (R. Estes, and G. Pregill, eds.). ... Phylogeny of hoplocercine lizards (Squamata: Iguania) with estimates of relative divergence times. Molecular Phylogenetics and ... Spiny Tails and Clades: A Fully Sampled Phylogeny of Hoplocercine Lizards (Iguanidae/ Hoplocercinae) and its Taxonomic and ... New algorithms and methods to estimate maximum-likelihood phylogenies: assessing the performance of PhyML 3.0. Systematic ...
Mitogenomic data are useful to reconstruct a molecular phylogeny of major collembolan taxa. In spite of the limited number of ... and an update on the phylogeny of collembolan lineages based on mitogenomic data The mitochondrial genome of the antarctic ... springtail Folsomotoma octooculata (Hexapoda; Collembola), and an update on the phylogeny of collembolan lineages based on ...
Molecular phylogeny of pimoid spiders and the limits of Linyphiidae, with a reassessment of male palpal homologies (Araneae, ... Tietze, D.T., Packert, M., Martens, J., Lehmann, H. & Sun, Y.-H. (2013) Complete phylogeny and historical biogeography of true ... Griswold, C.E., Coddington, J.A., Hormiga, G. & Scharff, N. (1998) Phylogeny of the orb-web building spiders (Araneae, ... Hormiga, G. (1993) Implications of the phylogeny of Pimoidae for the systematics of linyphiid spiders (Araneae, Araneoidea, ...
The Bayesian Approach to Molecular Phylogeny. Scornavacca, Celine; Delsuc, Frédéric; Galtier, Nicolas. Phylogenetics in the ...
A five-gene phylogeny of Pezizomycotina. / Spatafora, Joseph W.; Sung, Gi Ho; Johnson, Desiree et al. In: Mycologia, Vol. 98, ... A five-gene phylogeny of Pezizomycotina. Joseph W. Spatafora, Gi Ho Sung, Desiree Johnson, Cedar Hesse, Benjamin ORourke, ... A five-gene phylogeny of Pezizomycotina. Mycologia. 2006 Nov;98(6):1018-1028. doi: 10.3852/mycologia.98.6.1018 ... A five-gene phylogeny of Pezizomycotina. In: Mycologia. 2006 ; Vol. 98, No. 6. pp. 1018-1028. ...
A new species of Phrynops from Southern Brazil (Testudines, Chelidae), with comments on the phylogeny of the genus. Natália ... A new species of Phrynops from Southern Brazil (Testudines, Chelidae), with comments on the phylogeny of the genus. PeerJ ... A new species of Phrynops from Southern Brazil (Testudines, Chelidae), with comments on the phylogeny of the genus ...
... phylogeny, paleoecology, paleogeography, and evolution of fossil organisms. ... ANDREW B. SMITH "STRATIGRAPHY IN PHYLOGENY RECONSTRUCTION-RESPONSE," Journal of Paleontology, 76(4), 594-595, (1 July 2002) ... ANDREW B. SMITH "STRATIGRAPHY IN PHYLOGENY RECONSTRUCTION-RESPONSE," Journal of Paleontology 76(4), 594-595, (1 July 2002). ...
Tracing the origin and co-phylogeny of the caliciviruses. Graham J. Etherington, Susan M. Ring, Michael A. Charleston, Jo Dicks ... Etherington, GJ, Ring, SM, Charleston, MA, Dicks, J, Rayward-Smith, VJ & Roberts, IN 2006, Tracing the origin and co-phylogeny ... Tracing the origin and co-phylogeny of the caliciviruses. / Etherington, Graham J.; Ring, Susan M.; Charleston, Michael A.; ... title = "Tracing the origin and co-phylogeny of the caliciviruses",. abstract = "Caliciviruses infect a wide range of mammalian ...
... Author. BREURE ASH. RIJKSMUSEUM NATUURLIJKE HISTORIE,LEIDEN, ... GASTROPODA DIAGNOSIS TAXONOMIC KEY PHYLOGENY SOUTH AMERICA GEOGRAPHIC DISTRIBUTION MORPHOLOGY MOLLUSCA INVERTEBRATA FRESHWATER ... PHYLOGENY AND ZOOGEOGRAPHY OF BULIMULINAE (MOLLUSCA);s:8:\u0000*\u0000place;s:0:;s:6:\u0000*\u0000pub;s:0:;s: ... PHYLOGENY AND ZOOGEOGRAPHY OF BULIMULINAE (MOLLUSCA);s:8:\u0000*\u0000place;s:0:;s:6:\u0000*\u0000pub;s:0:;s: ...
  • Various plant families are treated with focus on phylogeny, diagnostic traits, biogeography and cultural plants. (lu.se)
  • Perfect phylogeny is a term used in computational phylogenetics to denote a phylogenetic tree in which all internal nodes may be labeled such that all characters evolve down the tree without homoplasy. (wikipedia.org)
  • It is rare that actual data adheres to the concept of perfect phylogeny. (wikipedia.org)
  • The statistical components of a perfect phylogenetic tree can best be described as follows: A perfect phylogeny for an n x m character state matrix M is a rooted tree T with n leaves satisfying: i. (wikipedia.org)
  • Character state matrices An example of a character matrix that can be depicted as a perfect phylogeny Perfect phylogeny is a theoretical framework that can also be used in more practical methods. (wikipedia.org)
  • One such example is that of Incomplete Directed Perfect Phylogeny. (wikipedia.org)
  • By utilizing algorithms derived from perfect phylogeny data we are able to attempt to reconstruct a phylogenetic tree in spite of these limitations. (wikipedia.org)
  • Perfect phylogeny is also used in the construction of haplotype maps. (wikipedia.org)
  • By utilizing the concepts and algorithms described in perfect phylogeny one can determine information regarding missing and unavailable haplotype data. (wikipedia.org)
  • By assuming that the set of haplotypes that result from genotype mapping corresponds and adheres to the concept of perfect phylogeny (as well as other assumptions such as perfect Mendelian inheritance and the fact that there is only one mutation per SNP), one is able to infer missing haplotype data. (wikipedia.org)
  • The rationale for this is that the perfect phylogeny near a disease affecting mutation should provide more information about the affected/unaffected classification than random trees. (springer.com)
  • Phylogeny-Aware Analysis of Metagenome Community Ecology Based on Matched Reference Genomes while Bypassing Taxonomy. (bvsalud.org)
  • Mathematics of Evolution and Phylogeny ( 2003 and 2005 ). (lirmm.fr)
  • You'll be £40.00 closer to your next £10.00 credit when you purchase Diversity, Phylogeny & Evolution in the Monocotyledons. (pen-and-sword.co.uk)
  • gene repertoire, phylogeny and evolution. (medlineplus.gov)
  • To resolve the phylogeny of certain mitochondrial DNA (mtDNA) haplogroups in eastern Europe and estimate their evolutionary age, a total of 73 samples representing mitochondrial haplogroups U4, HV*, and R1 were selected for complete mitochondrial genome sequencing from a collection of about 2,000 control region sequences sampled in eastern (Russians, Belorussians, and Ukrainians) and western (Poles, Czechs, and Slovaks) Slavs. (nih.gov)
  • 1. Phylogeny and major taxonomic groups. (lu.se)
  • Molecular trait indicators: moving beyond phylogeny in arbuscular mycorrhizal ecology. (vu.nl)
  • Dive into the research topics of 'Molecular trait indicators: moving beyond phylogeny in arbuscular mycorrhizal ecology. (vu.nl)
  • The YFV Uganda 2016 strain envelope sequence was aligned with reference YFV genomes by using MAFFT through the EMBL-EBI server ( http://www.ebi.ac.uk ), and phylogenies were generated with BEAST 1.8.4 ( 9 ), as previously described ( 7 ). (cdc.gov)
  • The phylogeny and evolutionary timescale of muscoidea (diptera: brachy" by Shuangmei Ding, Xuankun Li et al. (edu.au)
  • The phylogeny reported here will be a resource of broad utility for addressing additional evolutionary and ecological questions with this diverse group. (datadryad.org)
  • In this study we compare birds over the entire passerine phylogeny, so that we can compensate for evolutionary kinship. (lu.se)
  • 2012) HPV16 genetic variants: phylogeny and classification based on E6 and LCR. (who.int)
  • Here, we report a near-species-level phylogeny of the diverse (~832 species) New World clade Emberizoidea-the group that includes the familiar sparrows, cardinals, blackbirds, wood-warblers, tanagers, and their close relatives-to our knowledge the largest essentially complete (≥95%) phylogenetic hypothesis for any group of organisms. (datadryad.org)
  • The OGU method advances current read-based metagenomics in two dimensions (i) providing maximal resolution of community composition and (ii) permitting use of phylogeny -aware tools. (bvsalud.org)
  • Inferring a phylogeny from noisy VAF data under the PPM is a hard problem. (wikipedia.org)
  • Phylogeny of major intrinsic proteins. (lu.se)
  • In order to overcome these restrictions and circumvent the shortcomings of culture- and phylogeny-based approaches, we propose a shift toward plant and fungal protein-encoding genes as more immediate indicators of mycorrhizal contributions to ecological processes. (vu.nl)
  • This new molecular phylogeny and the inclusion of † P. whitei and other centrarchid fossils in the tip-dated fossilized birth-death analysis results in a new hypothesis of the timing of diversification in Centrarchidae that contextualizes the ages of centrarchid fossils to the timing of speciation among the extant species. (datadryad.org)
  • Molecular phylogeny of the Orthalicoidea land snails: Further support and surprises. (bvsalud.org)
  • We provide a multi-marker molecular phylogeny of this superfamily, reassessing its family - and genus-level classification . (bvsalud.org)
  • To investigate the phylogeny and timing of diversification of Centrarchidae, we deploy a dataset of DNA sequences of 16 nuclear genes sampled from nearly all of the recognized and undescribed species. (datadryad.org)
  • In addition to providing new temporal perspectives on the diversification of freshwater fishes in North America, this study may close of the chapter of centrarchid phylogeny inferred using Sanger sequenced genes, as the use of genomic-scale datasets becomes mainstream in the phylogenetics of fishes. (datadryad.org)
  • hence, we refer to this method as UPP , for Ultra-large alignments using Phylogeny-aware Profiles . (biomedcentral.com)
  • Early phylogeny of crinoids within the pelmatozoan clade. (antiqbook.com)
  • Therefore, phylogeny estimation generally uses methods such as maximum likelihood (ML) on estimated MSAs. (biomedcentral.com)
  • To evaluate temporal structure, we generated a time-naive phylogeny (i.e., a maximum-likelihood phylogeny) to enable determination of the patristic distance between all isolates on the phylogeny. (medscape.com)
  • We determined the root-to-tip distance, which is a phylogenetic measure of genetic distance, for each isolate of the maximum-likelihood phylogenies by using TempEst (formerly Path-o-gen). [ 31 ] We evaluated the correlation (Pearson method) between root-to-tip distance and collection date in R ( https://www.r-project.org/ ). (medscape.com)
  • A cornerstone of genomic analysis is building a phylogeny, which demonstrates the relatedness of individual isolates to the rest of the sequenced genomes. (nih.gov)
  • However, the volume of SARS-CoV-2 genomes presents novel opportunities beyond phylogenies, as well as computational challenges to traditional methods of genomic analyses and visualization. (nih.gov)
  • Chapter 3 presents a geometric morphometric analysis that is used to study broad patterns in theropod skull shape variation and compare the distribution of taxa in cranial morphospace (form) to both phylogeny and quantitative metrics of biting behaviour (function). (columbia.edu)
  • Two groups have recently published phylogenies based on whole genome sequences of cyanobacteria. (blogspot.com)
  • As expected, even when the goal is to infer basic topological features of the tumor phylogeny, rather than reconstructing the topology entirely, these approaches could be prohibitively slow. (nih.gov)
  • In this paper, we introduce fast deep learning solutions to the problems of inferring whether the most likely tree has a linear (chain) or branching topology and whether a perfect phylogeny is feasible from a given genotype matrix. (nih.gov)
  • Principled computational approaches for tumor phylogeny reconstruction via single-cell sequencing typically aim to build the most likely perfect phylogeny tree from the noisy genotype matrix - which represents genotype calls of single cells. (nih.gov)
  • Fraunhofer IDMT's audio phylogeny analysis software is able to automatically detect the best-quality original "root" version and coding history within a set of transcoded audio duplicates. (fraunhofer.de)
  • The phylogeny analysis software can then be used to remove everything but the best-quality root version, or to propagate metadata from "older" to "newer" copies within the system. (fraunhofer.de)
  • Our phylogenomic analyses also provide strong support for the inclusion of pycnogonids in a monophyletic Chelicerata, a paraphyletic Cycloneuralia, and a common origin of Arthropoda (tardigrades, onychophorans and arthropods), suggesting that previous phylogenies grouping tardigrades and nematodes may also have been subject to tree-reconstruction artefacts. (nih.gov)
  • Multimedia phylogeny, which can be considered as "family research" for media, aims at automatically detecting such relationships among related multimedia objects. (fraunhofer.de)
  • The phylogeny software can be used to understand the processing history among a set of copies or partial copies. (fraunhofer.de)
  • These three genera are the subject of ongoing research at the Academy which is focused on their phylogeny and circumscription. (calacademy.org)