Under What Circumstances Does a Secondary Oocyte Complete Meiosis II

Question

Under what circumstances does a secondary oocyte complete meiosis II?
A)In response to the LH surge at ovulation
B)Upon fertilization
C)In response to stimulation by FSH during the second week of the menstrual cycle
D)Upon entering the uterine tube
E)Upon reaching the uterus

Accepted Answer

A secondary oocyte completes meiosis II upon fertilization, when it is penetrated by a sperm. This results in the formation of a mature ovum and a second polar body. If fertilization does not occur, the secondary oocyte will degenerate after a certain amount of time.