Question

Extrusion of second polar body from egg nucleus occurs

(a) after entry of sperm but before completion of fertilisation 

(b) after completion of fertilisation 

(c) before entry of sperm 

(d) without any relation of sperm entry

Answer 1

Correct option (a) after entry of sperm but before completion of fertilisation 

Explanation

The sperm entry stimulates the secondary oocyte to undergo Meiotic II division, which produces the ovum and second polar body.