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What is the stage of the cell cycle at which primary oocytes are arrested?

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in Biology – Class 12 by (271k points)
What is the stage of the cell cycle at which primary oocytes are arrested?

(a) Prophase I

(b) Metaphase I

(c) Prophase II

(d) Metaphase II

The question was posed to me in final exam.

This intriguing question originated from Human Reproduction topic in chapter Human Reproduction of Biology – Class 12

1 Answer

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Best answer
Right option is (a) Prophase I

The best explanation: Oogonia are formed during fetal development. Soon they start undergoing meiosis but are arrested at Prophase I awaiting further cues of division. Oogonia at this stage are called primary oocytes.

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