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Question

What happens to the primary oocyte when the ovarian follicles mature?


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Solution

Primary oocyte:

The primary oocyte is formed in the prophase I meiotic division of oogonia.

When ovarian follicles get matured:

  1. The primary oocytes divide further to form secondary oocytes and a small polar body that deteriorates by apoptosis.
  2. The secondary oocyte formed by primary oocyte division is released by ovulation and gets surrounded by a layer of zona pellucida.

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