Results 341 to 350 of about 26,216 (365)
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Chromosome rotation and formation of synapsis
Nature, 1976ALTHOUGH the rotation and oscillation of the nuclei of cultured spermatocytes have been known for some years1,2, no correlations of this phenomenon with the stages of mitosis or meiosis, or with the biochemical or cytogenetic events during germ-cell development have been made.
Martti Parvinen, Karl-Ove Söderström
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Nature Genetics, 2005
The XY chromosome pair in mammalian males is sequestered into a transcriptionally dormant chromatin domain before the first meiotic division. New work shows that all chromosomes can suffer the same fate if they don't pair during meiosis, and that this may be part of a surveillance mechanism to protect against aneuploid gametes.
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The XY chromosome pair in mammalian males is sequestered into a transcriptionally dormant chromatin domain before the first meiotic division. New work shows that all chromosomes can suffer the same fate if they don't pair during meiosis, and that this may be part of a surveillance mechanism to protect against aneuploid gametes.
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ATM and RPA in meiotic chromosome synapsis and recombination [PDF]
Nature Genetics, 1997 ATM is a member of the phosphatidylinositol 3-kinase (PIK)-like kinases, some of which are active in regulating DNA damage-induced mitotic cell-cycle checkpoints. ATM also plays a role in meiosis. Spermatogenesis in Atm-/- male mice is disrupted, with chromosome fragmentation leading to meiotic arrest; in human patients with ataxia-telangiectasia (A-T),
Plug, Annemieke W. +7 more
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Sex chromosome synapsis and recombination in male guppies.
Zebrafish, 2015Guppy X and Y chromosomes represent an early stage in sex chromosome divergence. Synapsis and recombination between X and Y chromosomes attract special attention because recombination suppression promotes their differentiation, but previous studies have ...
A. Lisachov +3 more
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On the mechanism of homologous synapsis in lycosid spiders
Genome, 1995Lycosid spiders have 13 pairs of telocentric chromosomes and 2 nonhomologous sex chromosomes in males. At leptotene, the kinetochore ends are attached to the nuclear envelope via thickened attachment plaques. Homologous synapsis begins at the attachment plaques and proceeds zipper-like through the length of the synaptonemal complex.
Dwayne Wise, Jeanne L. Taylor
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Meiotic chromosome synapsis in a haploid yeast
Chromosoma, 1991An extensive synaptonemal complex (SC) is found at pachytene in whole mount spread preparations of a haploid yeast, Saccharomyces cerevisiae, strain. Whereas unsynapsed axial elements are present only in a few nuclei, in others non-homologous synapsis involves virtually the whole chromosome set.
Knud Nairz, Franz Klein, Josef Loidl
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Relationship between incomplete synapsis and chiasma localization
Chromosoma, 2009One of the subjects within the meiotic field that has been actively investigated in the recent years is the temporal and functional relationships between meiotic recombination, cohesin loading and synaptonemal complex (SC) assembly. Although the study of meiotic mutants has shed some light, many questions remain to be answered.
Julio S. Rufas +2 more
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Cerebral Cortex
Abstract Previous studies in autism spectrum disorder demonstrated an increased number of excitatory pyramidal cells and a decreased number of inhibitory parvalbumin+ chandelier interneurons in the prefrontal cortex of postmortem brains.
Gelareh, Vakilzadeh +4 more
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Abstract Previous studies in autism spectrum disorder demonstrated an increased number of excitatory pyramidal cells and a decreased number of inhibitory parvalbumin+ chandelier interneurons in the prefrontal cortex of postmortem brains.
Gelareh, Vakilzadeh +4 more
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Synapsis and Chromosome Rings in Œnothera
Nature, 1930IN a letter in NATURE of May 17, p. 743, Dr. Darlington, having observed what he believes to be parasynapsis or side by side pairing of threads during meiosis in certain plants, mostly allied to the Liliaceae, where such conditions have been described before, assumes that meiosis in all other organisms must fit in with his particular scheme of events ...
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Random walk models for DNA synapsis by resolvase
Journal of Molecular Biology, 1997During site-specific recombination by resolvase, the protein binds to two sites on a supercoiled DNA molecule and the loaded sites then interact with each other to form a synaptic complex. The kinetics of synapsis show non-exponential behaviour extending over five log units of time and are independent of the length of the DNA molecule and the length of
Sessions, RB +3 more
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