Human Reproduction Question 59
59. Extrusion of second polar body from egg nucleus occurs
[1993]
(a) after entry of sperm before completion of fertilization
(b) after completion of fertilization
(c) before entry of sperm
(d) without any relation of sperm entry
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Answer : a
Hints & Solutions
(a) The entry of sperm stimulate the secondary oocyte to resume and complete the suspended meiosis II. This produces a haploid mature ovum and a second polar body. The second polar body and sperm tail immediately degenerate.
