meiosis I
The teflon Gene Is Required for Maintenance of Autosomal Homolog Pairing at Meiosis I in Male Drosophila melanogaster
... In recombination-proficient organisms, chiasmata appear to mediate associations between homologs at metaphase of meiosis I. It is less clear how homolog associations are maintained in organisms that lack ...
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Monopolin subunit Csm1 associates with MIND complex to establish monopolar attachment of sister kinetochores at meiosis I
... The N-terminal domain of Dsn1 interacts with Csm1 The hypothesis that the MIND complex directly recruits monopolin to the kinetochore makes three key predictions. Firstly, at least one of its subunits should contain a ...
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Nonrecombinant meiosis I nondisjunction in Saccharomyces cerevisiae induced by tRNA ochre suppressors.
... independent meiosis I nondisjunction events, 50% will yield tetrads in which all four spores are nullisomic for one of the two nondisjoining chromosomes and 50% will yi[r] ...
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Recombination Can Partially Substitute for SPO13 in Regulating Meiosis I in Budding Yeast
... a wild-type SPO13 plasmid (data not shown). These tests spo13 mutants appear to be unique in allowing hap- demonstrated that 9 out of the 10 mutants contain spo13 loids to produce viable meiotic products: To identify ...
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MCAK regulates chromosome alignment but is not necessary for preventing aneuploidy in mouse oocyte meiosis I
... mid-meiosis I oocytes caused a spherical MT array around which bivalents were arranged with all kinetochores oriented towards the centre ...completed meiosis I, MCAK-MO again causing a small, ...
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Decreased Meiotic Intergenic Recombination and Increased Meiosis I Nondisjunction in exo1 Mutants of Saccharomyces cerevisiae
... Exonuclease I was originally identified as a 5⬘ → 3⬘ deoxyribonuclease present in fractionated extracts of Schizosaccharomyces pombe and Saccharomyces ...in meiosis, suggesting that exonuclease I is ...
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The Role of Centromere Alignment in Meiosis I Segregation of Homologous Chromosomes in Saccharomyces cerevisiae
... disrupts meiosis I segregation of chro- mosomes containing misaligned centromeres: To inves- tigate why the misaligned centromere of fragment IA- 110 segregated less efficiently than the aligned centro- ...
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Mps1 at kinetochores is essential for female mouse meiosis I
... female meiosis, chromosome missegregations lead to the generation of aneuploid oocytes and can cause the development of trisomies or ...female meiosis I is error prone, the full functionality of ...
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Nondisjunctional Segregations in Drosophila Female Meiosis I Are Preceded by Homolog Malorientation at Metaphase Arrest
... ABSTRACT The model of Drosophila female meiosis I was recently revised by the discovery that chromosome congression precedes metaphase I arrest. Use of the prior framework to interpret data from ...
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The SO(H)L(H) “O” drivers of oocyte growth and survival but not meiosis I
... influences meiosis (18). Oocytes enter meiosis in the mouse embryonic ovary at approximately ...of meiosis. To identify wheth- er gross perturbations in meiosis could account for rapid oocyte ...
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Nonrandom Homolog Segregation at Meiosis I in Schizosaccharomyces pombe Mutants Lacking Recombination
... of meiosis-induced recombination, homologs segregate to opposite poles at MI 63% of the ...of meiosis in the absence of recombination and are not peculiar to rec12 ...a meiosis-specific ...
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Plk1 is essential for proper chromosome segregation during meiosis I/meiosis II transition in pig oocytes
... arrested at ATI stage. Segregation of homologous chro- mosomes during ATI stage is a key event in meiosis. Any errors in this process may cause aneuploidy [44]. Recent studies have begun to shed light on ...
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Errors in chromosome segregation during oogenesis and early embryogenesis
... The main problems occurring during oogenesis are 1 errors in meiotic chromosome pairing and recombination at the meiosis I prophase; 2 insufficient elimination of chromosomally abnormal [r] ...
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The rec102 mutant of yeast is defective in meiotic recombination and chromosome synapsis.
... In the recl02 mutant, meiosis I chromosome seg- regation (and subsequent events) are significantly de- layed. This observation suggests that the transition from propha[r] ...
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The Saccharomyces cerevisiae Centromere Protein Slk19p Is Required for Two Successive Divisions During Meiosis
... single meiosis II division in slk19 mutants is in fact an diploid to a haploid ...during meiosis I if for example, Slk19p is re- The meiotic phenotype of slk19 mutants is similar to quired to hold ...
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GR Ch. 13 Meiosis.pdf
... Add these labels: parent cell, mitosis, meiosis, synapsis, homologous chromosomes, replicated chromosomes, sister chromatids, daughter cells, meiosis I, meiosis II, and crossing over.[r] ...
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Mutational Analysis of Meiotic and Mitotic Centromere Function in Saccharomyces cerevisiae
... While heterocentric diploids, carrying mutations in the element I and I1 regions undergo relatively normal chromosome segregation during meiosis I (CARBON and CLARKE 1[r] ...
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The Drosophila mei-S332 gene promotes sister-chromatid cohesion in meiosis following kinetochore differentiation.
... All eight mei-S332 alleles over a deficiency also resulted in much higher frequencies of meiosis I1 nondisjunction relative to meiosis I nondisjunction in males (Tab[r] ...
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Bio ExLife 9.5_9.6 -- meiosis
... metaphase I, the tetrads (rather than individual doubled chromosomes) are aligned at the center of the ...anaphase I, sister chromatids stay together and go to the same pole when the homologous chromosomes ...
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HECT E3 ligase ETC 1 regulates securin and cyclin B1 cytoplasmic abundance to promote timely anaphase during meiosis in C elegans
... metaphase I, depletion of ETC-1 in a wild-type background substantially increased the stability of IFY-1 and CYB-1 during meiosis II and caused a delay in anaphase II; no other changes in meiotic ...
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