Words similar to chiasmata

Example sentences for: chiasmata

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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.
This could involve structural components that persist on chromosomes at the positions where recombination and chiasmata had previously occurred, or could involve a diffusible component generated by recombination events.
The rec12 null and active site mutants are achiasmatic and, as anticipated, Rec12-dependent crossovers (chiasmata) are required to ensure proper reductional chromosome segregation in MI.
In the absence of crossover recombination (chiasmata) and a backup distributive (achiasmatic) system for chromosome segregation, MI nondisjunction should occur and 100% of any resulting diploid spore colonies would be heterozygous for centromere linked markers (Figure 5B).
Alternatively, some aspect of the crossovers or chiasmata may transduce the signal.