ZoologyExtrusion of second polar body from egg nucleus occurs

Extrusion of second polar body from egg nucleus occurs

  1. A

    after entry of sperm, before completion of fertilisation

  2. B

    after completion of fertilisation

  3. C

    before the entry of sperm

  4. D

    has no relation with sperm entry

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    Solution:

    The secretions of the acrosome help the sperm enter into the cytoplasm of the ovum through the zona pellucida and the plasma membrane. This induces the completion of the meiotic division of the secondary oocyte. The second meiotic division is also unequal and results in the formation of a second polar body and a haploid ovum (ootid).

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