alleryWhat triggers completion of meiosis II in a human secondary oocyte?
AMenstruation
BFollicle formation
COvulation alone
DSperm entry
Answer & Solution
Correct answer: D. Sperm entry
Sperm entry induces completion of the secondary oocyte’s second meiotic division. Unequal division forms the haploid ovum and second polar body; the first division had produced the secondary oocyte and first polar body.
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