Words similar to meioses
Example sentences for: meioses
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In female meioses of D. melanogaster , heterochromatic pairing of homologs can substitute for chiasmata to ensure bipolar spindle attachment of bivalents and subsequent distributive segregation [ 4 5 6 8 ] . Rec12 may serve a similar role in maintaining a paired (or pseudo-paired) state between achiasmatic chromosomes prior to the first meiotic division.
Approximately half of the diploid products from the rec12-117 and rec12-D15 (null) meioses were heterozygous for centromere-linked markers on chromosomes
Because there are between 11 and 18 crossovers per chromosome in wild-type S. pombe meioses, and those crossovers are distributed without interference [ 36 ] , we can estimate the residual number of crossovers present on each chromosome in the rec12 mutant meioses.
However, only about 50% of diploid meiotic products from rec12-D15 (null) mutant meioses were heterozygous for centromere linked markers (Figure 5E), indicating that some fraction of the products were derived from precocious separation of sister chromatids (PSS) and/or MII nondisjunction (Figure 5C, 5D).
By applying mapping functions for aneuploid meiotic products [ 47 ] , we can set a lower limit of 22% and 29% MII nondisjunction for the rec12-117 and rec12-D15 meioses analyzed, respectively.
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