Results 251 to 260 of about 611,533 (294)
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Philosophical Transactions of the Royal Society of London. B, Biological Sciences, 1977
Abstract Commonly accepted precepts are challenged : (1) that homologous chromosome pairing is normally mediated by nuclear envelope attachment sites; (2) that crossover site establishment awaits synaptic completion; and (3) that it is the function of the synaptonemal complex to hold homologues in register so that equal crossing over ...
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Abstract Commonly accepted precepts are challenged : (1) that homologous chromosome pairing is normally mediated by nuclear envelope attachment sites; (2) that crossover site establishment awaits synaptic completion; and (3) that it is the function of the synaptonemal complex to hold homologues in register so that equal crossing over ...
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Chimpanzee chromosome 12 is homologous to human chromosome arm 2q
Cytogenetics and Cell Genetics, 2008Most of the 46 human chromosomes find their counterparts in the 48 chimpanzee chromosomes except for chromosome 2 which has been hypothesized to have been derived from a centric fusion of two chimpanzee acrocentric chromosomes. These two chromosomes correspond to the human chromosomes 2p and 2g.
N C, Sun, C R, Sun, T, Ho
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Chromosomal homology in southern Akodon
Experientia, 1982Differential staining (G and C) of southern South American Akodon are presented. A. olivaceus, A. longipilis and A. sanborni all have the same karyotype (2n = 52, NF = 58). A virtually identical band sequence is observed. This situation is interpreted using the canalization model of chromosomal evolution which stresses an optimum karyotype for each ...
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On determining the parental origins of homologous chromosomes
Annals of Human Genetics, 1981SUMMARYGiven sets of measurements on a pair of homologous chromosomes from an individual and both his/her parents, methods for estimating the probability that the individual has inherited any particular two of the four parental homologues are discussed and compared. A new method with several desirable properties is proposed.
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Gene conversions and their relation to homologous chromosome pairing
Philosophical Transactions of the Royal Society of London. B, Biological Sciences, 1986Abstract Gene conversion is the non-reciprocal transfer of DNA sequences from one gene to a related gene elsewhere in the genome. Molecular evidence for its occurrence in higher eukaryotes was first described by our laboratory in 1980 in the two linked human foetal y-globin genes.
O, Smithies, P A, Powers
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Chromosome banding homologies in Swamp and Murrah buffalo
Journal of Heredity, 1981Silver staining of Swamp buffalo (2n = 48) metaphase chromosomes revealed telomeric nucleolus organizer regions (NOR's) located on five pairs of autosomes identified by R-banding as numbers 4 p (submetacentric), 8, 20, 22, and 23 (acrocentrics); interphase nuclei also showed no more than five nucleoli.
D, Di Berardino, L, Iannuzzi
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Phase separation drives pairing of homologous chromosomes
Current Genetics, 2020Pairing of homologous chromosomes is crucial for ensuring accurate segregation of chromosomes during meiosis. Molecular mechanisms of homologous chromosome pairing in meiosis have been extensively studied in the fission yeast Schizosaccharomyces pombe.
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Homologous chromosome recognition via nonspecific interactions
2023Abstract In many organisms, most notably Drosophila , homologous chromosomes in somatic cells associate with each other, a phenomenon known as somatic homolog pairing. Unlike in meiosis, where homology is read out at the level of DNA sequence complementarity, somatic homolog pairing
Wallace F. Marshall, Jennifer C. Fung
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Homologous Association of Oppositely Imprinted Chromosomal Domains
Science, 1996Human chromosome 15q11-q13 encompasses the Prader-Willi syndrome (PWS) and the Angelman syndrome (AS) loci, which are subject to parental imprinting, a process that marks the parental origin of certain chromosomal subregions. A temporal and spatial association between maternal and paternal chromosomes 15 was observed in human T lymphocytes by three ...
J M, LaSalle, M, Lalande
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Simulation of chromosomal homology searching in meiotic pairing
Journal of Theoretical Biology, 1995A cellular automaton model has been developed to simulate some aspects of chromosome behaviour during meiotic prophase when homologous chromosomes search for each other so that they can pair. Simulations allow one to compare the relative efficiencies of random searching by chromosome shuffling along the inner nuclear membrane or within the lumen of the
D, Dorninger, G, Karigl, J, Loidl
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