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The secondary oocyte has 46 chromatids, while the ovum has only 23 chromatids.

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in Biology – Class 12 by (271k points)
The secondary oocyte has 46 chromatids, while the ovum has only 23 chromatids.

(a) True

(b) False

The question was asked in exam.

My question is taken from Human Reproduction topic in chapter Human Reproduction of Biology – Class 12

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Right choice is (a) True

Easiest explanation: Secondary oocyte is formed after the first round of meiosis and thus has a haploid set of chromosomes i.e., 23 chromosomes. But each chromosome has two daughter chromatids, thus making a total of 46 chromatids. Ova are formed after the second round of meiosis, and each ovum gets a single chromatid, thus having a total of 23 chromatids.

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