MHT CET Biology question

The second maturation division of the mammalian ovum occurs

(A)Shortly after ovulation before the ovum makes entry into the Fallopian tube
(B)Until the ovum has been penetrated by a spermCorrect
(C)Until the nucleus of the sperm has fused with that of the ovum
(D)In the Graafian follicle following first maturation division

Answer: (B)

Solution

The secondary oocyte is arrested in metaphase II after ovulation and completes the second meiotic division only when a sperm penetrates it, so it does not

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Question ID VK-061760