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Question

During oogenesis, ovum is formed. How many ova are formed at the end of two maturation divisions from a single primary oocyte?


A

4

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B

3

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C

2

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D

1

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Solution

The correct option is D

1


The process of formation of a mature female gamete is called oogenesis. Oogenesis is initiated during the embryonic development stage when a couple of million gamete mother cells (oogonia) are formed within each foetal ovary; no more oogonia are formed and added after birth. These oogonia undergo mitotic divisions to form primary oocytes, which then begin to undergo meiosis I. They however, get arrested at prophase I. After the onset of puberty, every month, one or more of these primary oocytes continue their meiotic division, and a single ovum is released from one ovary.

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