Question

Oogonia are

• A. Constant in number before the birth and added after birth
• B. Constant in number and never be added after birth
• C. Constant in number before the birth without division
• D. Never be constant in number both before and after birth

Answer 1

Answer: (B)

Constant in number and never be added after birth

During the development of foetus, many oogonia are produced which undergo mitosis and form primary oocytes. These primary oocytes remain arrested at prophase I of meiosis I throughout the childhood. It is estimated that about 2 million primary oocytes are present in a female at the time of birth. No primary oocyte is added after birth.

Hence, oogonia are constant in number as they are formed at the embryonic stages of the foetus and no oogonia are formed after birth.

So, the correct answer is 'Constant in number and never be added after birth'.