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*  Small supernumerary marker chromosome
Humans typically have 22 pairs of autosomal chromosomes in their cells, and a pair of sex chromosomes. About 2.7 million ... 47th autosomal chromosome called a small supernumerary marker chromosome (sSMC). These small supernumerary marker chromosomes ... Small supernumerary marker chromosomes (sSMC) in humans. Cytogenet Genome Research, 2004; 107: 55-67 Liehr et al. Small ... can originate from any of the 24 different human chromosomes. About 70% of the cases with sSMC are de novo (new mutations), 30 ...
*  Homologous chromosome
The additional 23rd pair is the sex chromosomes, X and Y. If this pair is made up of an X and Y chromosome, then the pair of ... Therefore, when two chromosomes of the exact structure exist, they are able to pair together to form homologous chromosomes. ... A couple of homologous chromosomes, or homologs, are a set of one maternal and one paternal chromosome that pair up with each ... Homologous chromosomes are made up of chromosome pairs of approximately the same length, centromere position, and staining ...
*  Allosome
The chromosomes of the 23rd pair are called allosomes consisting of two X chromosomes in women, and an X chromosome and a Y ... In humans, each cell nucleus contains 23 pairs of chromosomes, a total of 46 chromosomes. The first 22 pairs are called ... The X chromosome is always present as the 23rd chromosome in the ovum, while either an X or a Y chromosomes can be present in ... Women therefore have 23 homologous chromosome pairs, while men have 22. The X and Y chromosomes do have small regions of ...
*  Gene pool
... hybrids may be weak hybrids may be partially sterile chromosomes may pair poorly or not at all recovery of desired phenotypes ... hybrids are generally fertile with good chromosome pairing; gene segregation is approximately normal and gene transfer is ... chromosome doubling) bridging crosses (e.g., with members of the secondary gene pool). Gene pool centres refers to areas on the ...
*  Transvection (genetics)
Transvection appears to be dependent upon chromosome pairing. In some cases, if one allele is placed on a different chromosome ... The first observation of mitotic (i.e. non-meiotic) chromosome pairing was discovered via microscopy in 1908 by Nettie Stevens ... McKee BD (March 2004). "Homologous pairing and chromosome dynamics in meiosis and mitosis". Biochim. Biophys. Acta. 1677 (1-3 ... Other mechanisms include pairing-sensitive silencing and enhancer bypass of a chromatin insulator through pairing-mediated ...
*  Desert grassland whiptail lizard
Lutes, A. A., Neaves, W.B., Baumann, D. P., Wiegraebe, W., Baumann, P. (2010). Sister chromosome pairing maintains ... This diversity is maintained by combining sister chromatids instead of pairing homologous chromosomes, thus allowing a ... This is because the lizards start off with twice the amount of chromosomes as would be found in sexually reproducing ... Current studies suggest that the lizards may be able to distinguish between homologous chromosomes and sister chromatids. The ...
*  Immature ovum
... containing both pairs of homologous chromosomes. There are 23 chromosome pairs. Thus, there are 46 chromosomes. Each chromosome ... Thus, it has only one of each pair of homologous chromosomes. In other words, it is haploid. However, each chromosome still has ... This is twice the number of chromosome pairs (2N). Oogonia are created in early embryonic life. All have turned into primary ... Each chromosome is split between the two ootids, leaving only one chromatid per chromosome. Thus, there are 23 chromatids in ...
*  Parthenogenesis in squamata
Pairing of identical sister chromosomes, in comparison to the alternative of pairing homologous chromosomes, maintains ... Whereas homologous chromosomes pair and separate during meiosis I in sexual species, identical duplicate sister chromosomes, ... pair and separate during meiosis I in true parthenotes..... in comparison to the alternative of pairing homologous chromosomes ... 2010). "Sister chromosome pairing maintains heterozygosity in parthenogenetic lizards". Nature. 464 (7286): 283-286. doi: ...
*  Coprinellus micaceus
Chromosome pairing and the lampbrush diplotene stage of meiotic prophase". Chromosoma (Berlin). 29 (3): 305-16. doi:10.1007/ ... The chromosome number of C. micaceus is n=12. Coprinellus micaceus is an edible species, and cooking inactivates the enzymes ... The chromosomes are readily discernible with light microscopy, and all of the meiotic stages are well-defined. These features ... "Metabolite profiles of interacting mycelial fronts differ for pairings of the wood decay basidiomycete fungus, Stereum hirsutum ...
*  CD99
"Homologous expressed genes in the human sex chromosome pairing region". Nature. 317 (6039): 739-41. doi:10.1038/317739a0. PMID ... Unusually for a gene present on the X chromosome, the CD99 gene does not undergo X inactivation, and it was the first such ... and the Y chromosome". Proc. Natl. Acad. Sci. U.S.A. 85 (15): 5605-9. doi:10.1073/pnas.85.15.5605. PMC 281808 . PMID 2456574. ... "Genetic evidence that a Y-linked gene in man is homologous to a gene on the X chromosome". Nature. 302 (5906): 346-9. doi: ...
*  Roupala
Both taxa also have 14 chromosome pairs. In 2006, the family's classification was redefined using molecular data. Here, Roupala ...
*  FKBP6
... is essential for homologous chromosome pairing in meiosis during spermatogenesis. Targeted inactivation of FKBP6 in mice ... 2003). "Essential role of Fkbp6 in male fertility and homologous chromosome pairing in meiosis". Science. 300 (5623): 1291-5. ...
*  MSH5
In these mice, the prophase I stage of meiosis is defective due to the disruption of chromosome pairing. This meiotic failure ... "Mammalian MutS homologue 5 is required for chromosome pairing in meiosis". Nature Genetics. 21 (1): 123-7. doi:10.1038/5075. ... "Mammalian MutS homologue 5 is required for chromosome pairing in meiosis". Nature Genetics. 21 (1): 123-7. doi:10.1038/5075. ... but they accomplish this repair in a way that does not lead to crossovers between homologous chromosomes. The known mechanism ...
*  Synteny
"Molecular characterization of Ph1 as a major chromosome pairing locus in polyploid wheat". Nature. 439: 749-752. doi:10.1038/ ... The term is sometimes also used to describe preservation of the precise order of genes on a chromosome passed down from a ... Today, however, biologists usually refer to synteny as the conservation of blocks of order within two sets of chromosomes that ... In contrast, any loci on the same chromosome are by definition syntenic, even if their recombination frequency cannot be ...
*  Homologous somatic pairing
Somatic pairing of homologous chromosomes is similar to pre- and early meiotic pairing (see article: Homologous chromosome#In ... Metz, Charles W. (1916). "Chromosome studies on the Diptera. II. The paired association of chromosomes in the Diptera, and its ... Fung, Jennifer C.; Marshall, Wallace F.; Dernburg, Abby; Agard, David A.; Sedat, John W. (1998). "Homologous Chromosome Pairing ... Copenhaver, Gregory P.; Bosco, Giovanni (2012). "Chromosome Pairing: A Hidden Treasure No More". PLoS Genetics. 8 (5): e1002737 ...
*  Robert P. Celarier
Elyonurus argenteus, a South African Grass with Five Chromosome Pairs. Bull. of the Torrey Botanical Club 84 (3): 157-162 , ... Basic Chromosome Number of Four in the Subfamily Panicoideae of the Gramineae. Science 126 (3285): 1247-1248 K.L. Mehra, M.L. ... Tertiary Butyl Alcohol Dehydration of Chromosome Smears. Biotechnic & Histochemistry 31 (4): 155-157 1957. ...
*  Cryptococcus neoformans
Dmc1 mediates homologous chromosome pairing during meiosis and repair of double-strand breaks in DNA. One benefit of meiosis in ...
*  Prophase
The paired homologous chromosome bound by the synaptonemal complex are referred to as bivalents or tetrads. Sex (X and Y) ... To ensure pairing of homologous chromosomes and recombination of genetic material occurs properly, there are cellular ... Prophase I the most complex phase in all of meiosis because homologous chromosomes must pair and exchange genetic information. ... Homologous regions within homologous chromosome pairs begin to associate with each other. In the second phase of prophase I, ...
*  Lilium longiflorum
Holm, Preben Bach (1977). "Three-dimensional reconstruction of chromosome pairing during the zygotene stage of meiosis in ...
*  Ting Wu
Her studies explore transvection, the zeste gene, chromosome pairing, and Polycomb-group genes and chromatin remodeling. She ... pairing. Such disruption can generally be accomplished by introduction of a heterozygous rearrangement that disrupts pairing in ... Wu's research has focused on the role of chromosome behavior in inheritance and gene activity, with emphasis on the widespread ... Wu's research has focused on the role of chromosome behavior gene activity and inheritance, with emphasis on widespread ...
*  Reproductive system disease
Androgen insensitivity syndrome - A genetic disorder causing people who are genetically male (i.e. XY chromosome pair) to ...
*  1q21.1 copy number variations
... the chromosome pairs splits and a representative of each pair goes to one daughter cell. In this way the number of chromosomes ... In a common situation a human cell has one pair of identical chromosomes on chromosome 1. With the 1q21.1 CNVs one chromosome ... of the pair is not complete because a part of the sequence of the chromosome is missing, or overcomplete, because some parts of ... The result is that one chromosome is of normal length and the other one is too long or too short. The structure of 1q21.1 is ...
*  1q21.1 deletion syndrome
... one chromosome of the pair is not complete, because a part of the sequence of the chromosome is missing. One chromosome has the ... the chromosome pairs split and a representative of each pair goes to one daughter cell. In this way the number of chromosomes ... A human cell has one pair of identical chromosomes on chromosome 1. With the 1q21.1 deletion syndrome, ... In 1q21.1, the '1' stands for chromosome 1, the 'q' stands for the long arm of the chromosome and '21.1' stands for the part of ...
*  XY (magazine)
Its name is a reference to the XY chromosome pair found in males. XY published issue 50 in October 2016 (with its original ...
*  List of model organisms
It is a diploid monocot with 10 large chromosome pairs, easily studied with the microscope. Its genetic features, including ... The genome is a circle of 11 genes, 5386 base pairs in length. SV40 T4 phage Tobacco mosaic virus Herpes simplex virus ...
*  Prokaryotic DNA replication
Furthermore, DNA polymerase III must be able to distinguish between correctly paired bases and incorrectly paired bases. This ... Chromosome replication in bacteria is regulated at the initiation stage. DnaA-ATP is hydrolyzed into the inactive DnaA-ADP by ... This pocket has a tyrosine residue that is able to form van der Waals interactions with the correctly paired nucleotide. In ... The mutation rate per base pair per replication during phage T4 DNA synthesis is 1.7 per 108. Termination of DNA replication in ...
*  Mating in fungi
... disturbed chromosome pairing or disturbed pachytene or diplotene). The number of genes affecting the diploid stage was ... A pair of septa forms around the merged tips, enclosing nuclei from both isolates. A second pair of septa forms two adjacent ... The diploid nucleus has 14 chromosomes formed from the two fused haploid nuclei that had 7 chromosomes each. Formation of the ... Each of these ascogenous hyphae bends to form a hook (or crozier) at its tip and the A and a pair of haploid nuclei within the ...