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NEET2019ZoologyHuman ReproductionActual

Extrusion of second polar body from egg nucleus occurs

Options

  1. Aafter entry of sperm but before fertilization.
  2. Bafter fertilization.
  3. Cbefore entry of sperm into ovum.
  4. Dsimultaneously with first cleavage.

Correct answer

A. after entry of sperm but before fertilization.

Step-by-step solution

The sperm entry stimulates the secondary oocyte to undergo a meiotic II division, which produces the ovum and the second polar body. This event occurs before fertilization.

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