Extrusion of second polar body from egg nucleus occurs
Extrusion of second polar body from egg nucleus occurs
after entry of sperm but before fertilization.
after fertilization.
before entry of sperm into ovum.
simultaneously with first cleavage.
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.