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Showing 1 to 20 of 183 for “"meiosis"”.
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Mechanisms preventing DNA replication between Meiosis I and Meiosis II
… haploid gametes. These gametes are produced by meiosis, a specialized cell division during which one round of DNA replication is followed by two rounds of chromosome segregation, Meiosis I (MI) and Meiosis II (MII). This imbalance between rounds of DNA replication and chromosome segregation …
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Histones of Meiosis
Made available in DSpace on 2015-05-13T22:11:48Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6604291.PDF: 3430333 bytes, checksum: c713489f476e337f8b6d3d2cca9a2561 (MD5) Previous issue date: 1965
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Meiosis in Thermobia domestica Pack
Testicular tissue removed from 10 month old fire-brats, Thermobia domestica Pack., was prepared for cytogenetic examination by the squash technique. Chromatin staining with acetic orcein and the use of phase contrast microscopy simplified preparatory procedures and preserved the greatest amount of …
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Meiosis-specific Regulation of the Anaphase-Promoting Complex
Meiosis is a specialized cell cycle, which generates haploid gametes from diploid parental cells. During meiosis one round of cohesion establishment during premeiotic DNA replication mediates two rounds of chromosome segregation. During meiosis I homologous chromosomes separate, whereas sister …
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Chromosome malorientation precedes nondisjunction during female meiosis I
<p>Meiosis is a specialized form of cellular division in which the gametes are formed. During female meiosis I, homologous chromosomes must coorient to opposite poles to ensure proper segregation, otherwise nondisjunction can occur which would form aneuploid gametes. The recent discovery that …
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The role of SYN1 in early Arabidopsis meiosis
SYN1 is a meiosis-specific Arabidopsis homologue of yeast REC8. REC8 is an important component of the meiotic cohesion complex which maintains cohesion between sister chromatids. Cytological analysis of syn1\(^{-/-}\) has shown chromosome fragmentation at metaphase I. To determine the basis of …
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Analysis of cell cycle surveillance mechanisms in meiosis
Numerous DNA double-strand breaks (DSBs) are introduced into the genome in the course of meiotic recombination. This poses a significant hazard to the genomic integrity of the cell. Studies in a number of organisms have unveiled the existence of surveillance mechanisms or checkpoints that couple …
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Cyclin-Dependent Kinase regulation and function during meiosis
Meiosis is the process by which haploid gametes are produced from a diploid progenitor cell. Accurate completion of the meiotic divisions requires a variety of modifications to the mitotic chromosome segregation machinery, which allow the reductional meiotic chromosome segregation program to occur. …
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Studying factors influencing meiosis progression in the mouse oocyte
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01
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CHARACTERISATION OF A NOVEL SPINDLE DOMAIN IN MAMMALIAN MEIOSIS
… centre (MTOC) during mitosis. In mammalian meiosis, centrioles are eliminated early on during oogenesis. Despite the absence of centrosomes, a large number of centrosomal proteins are highly expressed in mouse oocytes. Here, I characterise the localisation and function of centrosomal …
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Transcriptional and developmental consequences of aneuploidy during male meiosis
… genome integrity is especially important during meiosis, the specialised cell division programme in the germline that generates haploid gametes. As these cells transmit genetic information to the next generation, the consequences of meiotic errors are not restricted to an organismal level, but …
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Whole genome approaches to identify genes involved in early meiosis.
Meiosis is a process which occurs in sexually reproducing organisms to halve the genetic complement prior to fertilisation. During meiosis a single round of DNA replication is followed by two successive rounds of chromosome segregation and cell division. The meiotic pathway in plants is complex …
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Investigating the control of pairing and crossover formation in meiosis of Arabidopsis thaliana
During meiosis, homologous chromosomes pair and become connected by formation of the synaptonemal complex. Recombination is initiated by DNA double strand breaks (DSBs), formed by the protein SPO11-1. In Arabidopsis, ~10% of DSBs are repaired as crossovers, which are reciprocal exchanges of DNA …
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Separase cleaves the kinetochore protein Meikin to direct the meiosis I/II transition
… because homologous chromosomes are segregated in meiosis I, but sister chromatids are segregated in meiosis II, this requires a dramatic rewiring of the cell division machinery between the two divisions. How meiotic cells coordinate this rapid and substantial change to the cell division machinery …
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Regulation of meiosis I chromosome segregation by Spol3 and Cdc5 in Saccharomyces cerevisiae
Meiosis is a specialized cell cycle that generates gametes for the purpose of disseminating genetic material to the next generation. The reduction of chromosome number by half is brought about two chromosome segregation phases following a single DNA replication phase. In the first division, …
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Fission Yeast Exon Junction Complex Orthologs Ensure the Maturation of Meiotic Transcripts During Meiosis
Meiosis, requisite for sexual reproduction, encompasses unique processes that do not occur in vegetative cells, including precise expression of specific genes (meiotic genes). During mitotic growth, to ensure the silencing of many constitutively transcribed meiotic genes, Mmi1-NURS (Mtl1-Red1 core) …
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The Effects of Inhibitors of Rna and Protein Synthesis on Cytological Development During Meiosis
Made available in DSpace on 2014-12-09T22:25:40Z (GMT). No. of bitstreams: 1 6406091.pdf: 3894053 bytes, checksum: 4ba8711d0b93397369d6341b11c1bc2f (MD5) Previous issue date: 1963
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A role for the Speedy gene family in the early stages of mammalian meiosis
Meiosis is the process by which a diploid cell undergoes two sequential rounds of division without an intervening round of DNA replication. The result is the formation of haploid gametes. The genes and signals that regulate the decision to enter meiosis are not entirely elucidated in mammals. I …
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The developmental role and regulation of the Anaphase-Promoting Complex/Cyclosome in Drosophila meiosis
Meiosis is a modified cell cycle in which two round of chromosome segregation occur without an intervening DNA synthesis phase. As in mitosis, these cell divisions are driven in part by proteolysis mediated by the Anaphase-Promoting Complex/ Cyclosome (APC/C). During oogenesis of multicellular …
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