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  • Genetics
  • These chromosomes determine individual genetics traits as well as a person's gender. (reference.com)
  • As part of the International Multi-centre ADHD Genetics project we completed an affected sibling pair study of 142 narrowly defined Diagnostic and Statistical Manual of Mental Disorders, fourth edition combined type attention deficit hyperactivity disorder (ADHD) proband-sibling pairs. (soton.ac.uk)
  • gene
  • Therefore, hexaploid wheat possesses three related genomes, totaling 16,000 Mb in size, composed of seven sets of six related chromosomes with similar gene orders and vast tracts of related and highly repetitive sequences. (pnas.org)
  • We discuss an alternative based on two observations: transcription occurs in factories that specialize in transcribing specific gene sub-sets, and chromosomes only pair when transcribed. (ox.ac.uk)
  • Evidence for a gene influencing blood pressure on chromosome 17. (semanticscholar.org)
  • Tau is a candidate gene for chromosome 17 frontotemporal dementia. (semanticscholar.org)
  • Olfactory receptor gene cluster on human chromosome 17: possible duplication of an ancestral receptor repertoire. (semanticscholar.org)
  • Gametes contain only 1 gene from each pair. (justanswer.com)
  • We have sequenced 45- to 70-kb regions surrounding the four copies of the hsp82 gene of the bdelloid rotifer Philodina roseola , each of which is on a separate chromosome. (pnas.org)
  • The four regions comprise two colinear gene-rich pairs with gene content, order, and orientation conserved within each pair. (pnas.org)
  • Only a minority of genes are common to both pairs, also in the same orientation and order, but separated by gene-rich segments present in only one or the other pair. (pnas.org)
  • Divergence in 1,000-bp windows varies along an alignment of a colinear pair, from zero to as much as 20% in a pattern consistent with gene conversion associated with recombinational repair of DNA double-strand breaks. (pnas.org)
  • One of the genes that has been characterized most extensively in bdelloids is the heat-shock gene hsp82 of Philodina roseola , of which there are four copies, each on a separate chromosome ( 19 , 20 ). (pnas.org)
  • wheat
  • In the absence of the Ph1 locus chromosome specificity has been suppressed in this project, allowing inter-specific chromosome associations between wheat and H. chilense for the first time. (csic.es)
  • nucleus
  • C) In him-8 mutant hermaphrodites we observe one pair of unsynapsed chromosomes in each nucleus. (nih.gov)
  • Although pairs of colinear chromosomes are a characteristic of sexually reproducing diploids and polyploids, a quite different explanation for their presence in bdelloids is suggested by the recent finding that bdelloid rotifers can recover and resume reproduction after suffering hundreds of radiation-induced DNA double-strand breaks per oocyte nucleus. (pnas.org)
  • probes
  • To better understand this mechanism, a research team including Masamichi Kuroda and Takafumi Fujimoto of Hokkaido University's Graduate School of Fisheries Sciences developed DNA probes to track the chromosomes in dojo loach's somatic and reproductive cells. (phys.org)
  • B) Genomic localizations of the three FISH probes used to quantify homolog pairing. (nih.gov)
  • Three probes were scored independently: one from the left end of X chromosome (red), one from the right end of X chromosome (green), and the 5S rDNA, which marks the right arm of chromosome V (blue). (nih.gov)
  • In both him-8 alleles, pairing of the X chromosome probes did not rise above the baseline levels observed in the premeiotic region (zone 1), whereas Chromosome V association rates and dynamics were very similar to what we observed in wild-type hermaphrodites. (nih.gov)
  • cells
  • Their 'somatic' non-reproductive cells contain a full set of 50 chromosomes-25 from each parent-while their reproductive egg and sperm cells contain 25 chromosomes. (phys.org)
  • How the reproductive process leads to 50 chromosomes in egg cells has been unclear. (phys.org)
  • Fluorescent signals indicate that the half of the chromosomes in the somatic cells of female clones are derived from type B (green signals). (phys.org)
  • According to the results published in Chromosome Research, the fluorescent signals indicated that somatic cells of the female clones have 25 chromosomes derived from type B, providing evidence that their ancestral origin arose when type A and B mated. (phys.org)
  • Interestingly, RAD-51 foci were readily observed on the X chromosome of androdioecious male germ cells, while very few were detected in gonochoristic male germ cells. (genetics.org)
  • In contrast, in C. remanei and C. brenneri male germ cells, the X chromosome does not undergo pseudosynapsis and appears refractory to SPO-11-induced breaks. (genetics.org)
  • How do cells sense a chromosome pair that has not yet undergone a crossover? (stanford.edu)
  • proteins
  • Synaptonemal complex proteins: occurrence, epitope mapping and chromosome disjunction. (semanticscholar.org)
  • In the present study, we found that the human EVL (Ena/Vasp-like) protein, which is suggested to be involved in actin-remodeling processes, unexpectedly binds to the RAD51 and RAD51B proteins and stimulates the RAD51-mediated homologous pairing and strand exchange. (biomedsearch.com)
  • confer
  • Their question was savvy and unique-does multiple copy number variants on chromosome 15 confer greater developmental risk compared to only one copy number variant? (paperity.org)
  • somatic
  • Unlike the sexually reproducing female population, both their somatic and reproductive eggs contain 50 chromosomes, assuring their clonal reproduction. (phys.org)
  • organisms
  • These organisms gather all the chromosome ends against the nuclear envelope into one big cluster called a bouquet or into a bunch of smaller clusters called aggregates, and this brings the chromosome ends into proximity with each other," Hawley says. (medicalnewstoday.com)
  • Organisms exhibiting sexual reproduction carry two copies (homologues) of each chromosome. (pnas.org)
  • maternal
  • Thus, while Garfunkel has an additional deletion on his maternal chromosome 15, it is clear, as indexed by the results of his VABS and MSEL assessments, that this additional genetic variant did not pose greater developmental risk. (paperity.org)
  • signals
  • A) Diagram of a hermaphrodite gonad, indicating the five zones in which the pairing of FISH signals was scored. (nih.gov)
  • C) Graphs indicating the fraction of paired FISH signals in each zone for wild-type (N2), him-8(mn353) , and him-8(me4) hermaphrodites. (nih.gov)
  • traits
  • Human chromosomes are typically distributed equally during reproduction, causing the children to be born with traits inherited from both the mother and father. (reference.com)
  • sequences
  • The alignment of Chromosomes at homologous sequences. (jove.com)
  • In common with these structural changes in the subtelomeric regions, visualization of the overall chromosome structure by using dispersed repetitive sequences reveals that these repetitive regions also undergo extensive remodeling before pairing ( 7 ). (pnas.org)
  • linkage
  • No evidence for linkage of MODY1 and MODY3 markers to NIDDM in African-American sib pairs was observed. (diabetesjournals.org)
  • A maximum LOD score of 1.48 was calculated for linkage to MODYl-linked loci and 1.45 to MODY3-linked loci in Caucasian sib pairs. (diabetesjournals.org)
  • undergo
  • Moreover, a failure to undergo remodeling results in reduced pairing between the homologues. (pnas.org)
  • facilitate
  • These features facilitate visualizing chromosome organization using high-resolution microscopic imaging in the context of intact 3D nuclear architecture. (stanford.edu)
  • duplication
  • HEALTH AND HUMAN SCIENCES Duplication Syndrome 0 Angelman Syndrome 0 0 Student researchers: Colleen Sheehy and Anne Nanninga , Juniors - Several types of copy number variants, or a surplus or absence of genetic information encoded by DNA, appear in the 11.2-13.1 region of chromosome 15. (paperity.org)
  • Chromosome 15q11.2-13.1 duplication syndrome (dup15q) is caused by duplications of chromosome 15q11.2-13.1. (paperity.org)
  • study
  • The application of these concepts to the study of the ultrastructure of mammalian sex chromosomes allowed the establishment of a structural and behavioural pattern (especially through the extensive work performed by Solari). (springer.com)
  • American marsupials chromosomes: Why study them? (semanticscholar.org)
  • results
  • In the female clones, the team found that the chromosomal material doubles twice so that when it divides, each results in an egg cell containing a full set of 50 chromosomes. (phys.org)