Question

Choose the incorrect option.

• A. Primary oocyte - 2n
• B. Secondary oocyte - n
• C. Spermatogonia - 2n
• D. Spermatids - 2n

Answer 1

The correct option is D Spermatids - 2n

The diploid (2n) oogonia cells of the ovary undergo differentiation and give rise to primary oocyte. Thus primary oocyte is also diploid (2n).
The primary oocyte undergoes meiosis I and gives rise to haploid secondary oocyte (n).

Spermatogonia are diploid cells (2n) that undergo differentiation to give rise to the primary spermatocyte (2n). Primary spermatocyte undergoes meiosis I to form secondary spermatocyte (n). Secondary spermatocyte undergoes meiosis II to form haploid spermatids (n).

Hence option C is incorrect.