Question

When sperm penetrate secondary oocyte during its unequal meiotic division, how many polar body (bodies) is/are produced?

• A.
  One
• B.
  Two
• C.
  Three
• D.
  Four

Answer 1

The correct option is A

One
Oogenesis (process of formation of female gamete) is initiated during the embryonic developmental stage of ovum. The cell starts dividing and enter into the prophase - I stage of meiotic division and get temporarily arrested, called as a primary oocyte.

In the mature tertiary follicle, primary oocyte completes its first unequal meiotic division in which secondary oocyte and tiny first polar body is formed and gets arrested in metaphase II stage of the meiotic division until the sperms fuses and cause fertilization.

When sperms penetrate secondary oocyte, it now completes its second unequal meiotic division and forms a very tiny polar body and the ovum.

So, the correct answer is 'one'.