Question

Human females possess $44+XX$ chromosomes. The secondary oocyte shall have

• A. $44+XX$
• B. $22+X$
• C. $22$
• D. $44$

Answer 1

Answer: (B)

$22+X$

Oogenesis is the process of formation of ovum from oogonia. The oogonia undergo growth to form the primary oocyte. This primary oocyte is diploid, i.e., contains 44+XX chromosomes. However, the primary oocyte now undergoes first meiotic division to form the secondary oocyte and a polar body. This secondary oocyte is haploid now and contains 22+X chromosomes.

So the correct answer is B.