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

Show Answer

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.