a nondisjunction occurs during meiosis ii of sperm formation. are the two homologues of the affected chromosome in aneuploid gametes identical to one another or different from one another?

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10-11-2022
Biology

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a nondisjunction occurs during meiosis ii of sperm formation. are the two homologues of the affected chromosome in aneuploid gametes identical to one another or different from one another?

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kjuli1766 kjuli1766 · Answer 1 · 2022-11-16T04:36:42-05:00

Nondisjunction occurs during meiosis ii of sperm formation. are the two homologs of the affected chromosome in aneuploid gametes identical to one another or different from one another Gonads.

Aneuploidy is the presence of an unusually wide variety of chromosomes and is distinctly established in human gametes. certainly, aneuploidy is the main genetic cause of spontaneous miscarriage and congenital delivery defects in our species.

The maximum common motive of aneuploidy is nondisjunction, the failure of chromosomes to disjoin typically for the duration of meiosis (seeing. ninety-eight. 1). Nondisjunction can arise at some point of meiosis I or II or throughout mitosis, although maternal meiosis I am the maximum not unusual nondisjunction in aneuploidies (e.g., Down syndrome, trisomy 18).

Although it does not have an effect on the fertilization rate, an expanded sperm aneuploidy fee is associated with an extra rate of pregnancy failure. nevertheless, a few patients with increased sperm aneuploidy price can still gain a being pregnant, however with an expanded hazard of generating an aneuploid offspring.

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