Meiotic chromosome
Meiotic chromosome behaviour in Cenchrus ciliaris</i (Poaceae: Panicoideae)
... The meiotic chromosome behaviour of the polyploid specimens varied from being normal to highly irregular, depending on the number of genomes present and their ...more meiotic abnormalities, due to ...
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Meiotic Chromosome Morphology and Behavior in zip1 Mutants of Saccharomyces cerevisiae
... was Chromosome synapsis and meiotic cell cycle control: based on the observation that duplication or triplication Temporal studies have demonstrated that mature cross- of a restriction fragment encoding ...
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MEIOTIC CHROMOSOME BEHAVIOR OF AN INVERTED INSERTIONAL TRANSLOCATION IN NEUROSPORA
... When pairing fails between the translocated segment in 6 and its homologous region in chromo- some 1, buckles or loops are formed at pachynema in the deletion or insertion a[r] ...
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DIS1: a yeast gene required for proper meiotic chromosome disjunction.
... Taken together with the apparent centromere linkage of copper resistance, and the uniform level of resis- tance from all copper-resistant isolates, this result strong[r] ...
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Meiotic chromosome pairing in triploid and tetraploid Saccharomyces cerevisiae.
... Also the pictures by BYERS and GOETSCH ( 1975) of sectioned tetraploid yeast SCs suggest that all four chromosomes contact each other in some regions, but in the [r] ...
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Cadmium sulphide (cds) and copper oxide (cuo) nanoparticles (nps) mediated phenotypic mutation in coriandrum sativum l. (apiaceae)
... Meiotic chromosome configurations studied in mutant and control plant types (Fig 3A-F) reveal 2n = 22 (n = 11) chromosomes always (Table 5) with predominant of 11 bivalent formation (control: ...Average ...
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Meiotic Crossing Over Between Nonhomologous Chromosomes Affects Chromosome Segregation in Yeast
... Strains used to assess the effect of ectopic recombi- nation on meiotic chromosome segregation: Diploid yeast strains were constructed to determine what effect, if a[r] ...
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Identification of novel modifiers of chromosome inheritance: using a genetically sensitised drosophila model
... XU, H., BEASLEY, M., VERSCHOOR, S., INSELMAN, A., HANDEL, M. AND MCKAY, M. (2004) A new role for the mitotic RAD21/SCC1 cohesin in meiotic chromosome cohesion and segregation in the mouse. EMBO Rep 5(4): ...
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Toward a Comprehensive Genetic Analysis of Male Fertility in Drosophila melanogaster
... Figure 1.—Comparisons of the stages of spermato- genesis in normal bw; st adult males (left) and ms mutants (right) as viewed with phase-contrast micros- copy. The low magnifica- tion view of the normal tes- tis in A ...
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An implanted recombination hot spot stimulates recombination and enhances sister chromatid cohesion of heterologous YACs during yeast meiosis.
... Unique features of meiotic chromosome behavior are extensive pairing of homologous chromosomes, a high frequency of recombination, and an orderly “reduc- tional” disjunction [r] ...
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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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Chromosome-Wide Regulation of Meiotic Crossover Formation in Caenorhabditis elegans Requires Properly Assembled Chromosome Axes
... of meiotic chromosome axes, 2004)], several additional features are ...of meiotic in the him-3(me80) mutant appear bigger and brighter ...increase meiotic axis structures plays an important ...
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Evidence of Meiotic Crossover Control in Saccharomyces cerevisiae Through Mec1-Mediated Phosphorylation of Replication Protein A
... in meiotic recombination as it binds to the 39 ssDNA extensions at the DNA double- strand breaks in preparation for subsequent binding by the recombinases Rad51 and Dmc1, which perform strand invasion (for review, ...
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Mating Within the Meiotic Tetrad and the Maintenance of Genomic Heterozygosity
... population of Microbotryum (Delmotte et al. 1999). among-population heterozygosity in automictic species, Using an experimental approach, future studies could particularly when linkage relationships to the centro- ...
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Spindle Assembly and Chromosome Segregation Requires Central Spindle Proteins in Drosophila Oocytes
... homologous chromosome bi-orientation and spindle ...bipolar meiotic spindle and chromosome bi-orientation in ...the meiotic mutant phenotype for some of the genes identi fi ed in these screens ...
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THE EFFECT OF TEMPERATURE ON MEIOTIC LOSS OF THE Y CHROMOSOME IN THE MALE DROSOPHILA
... whether this difference was the result of an increase in the frequency of synapsis between X and Y at the cooler temperature; and (2) fram the observations on the behavior o[r] ...
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Contributions of classical and molecular cytogenetic in meiotic analysis and pollen viability for plant breeding.
... Through analysis by Alexander solution, the unviable pollen grains (GP) can be considered of three types: empty (T1 - no cytoplasm), contracted (T2 - contracted cytoplasm), and sprayed (T3 - sprayed cytoplasm) (Souza et ...
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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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Chromosome segregation and chromatin integrity in spermatozoa from a t(2;8)(p24;p21)mat carrier: A case-report
... The meiotic segregation pattern and aneuploidy of chromosome-8 and chromosome-2 were analyzed by ...of chromosome-8 and chromosome-Y revealed approximately three and 24 fold increased ...
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Long-Term Fragility of Y Chromosomes Is Dominated by Short-Term Resolution of Sexual Antagonism
... for meiotic pairing of sex chromosomes in the heterogametic sex becomes small, likely creating prob- lems during male meiosis (Dumont ...sex chromosome inversions can more easily invade Y(W) than X(Z) ...
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