Question

During spermatogenesis, which of the following undergoes meiosis II to produce four haploid mature sperm cells? Haploid primary spermatocyte Diploid secondary spermatocyte Secondary spermatocytes

Answer 1

The correct answer is secondary spermatocyte.

Explanation:

The process in which haploid spermatozoa develop from stem or germ cells is spermatogenesis. This process begins with the mitotic cell division of the germ cells. The mitotic division of these cells produces 2 types of cells, type B or the second type of cells differentiate into spermatocytes. The primary spermatocyte divides undergoes Meiosis I into 2 secondary spermatocytes.

These two secondary spermatocytes cells divide into four uniform haploid spermatids by Meiosis II. All four spermatids are turned into sperm.

Thus, the correct answer is secondary spermatocytes.

Answer 2

During spermatogenesis, differentiating germ cells move between adjacent Sertoli cells in the direction of light. They go through the following stages of development:
-Spermatogonia A-Spermatogonia B-Primary spermatocyte (= 1st order spermatocyte)-Secondary spermatocyte (= 2nd order spermatocyte)-spermatid-spermatozoid
And now back to the question:
*Haploid primary spermatocyte
*Diploid secondary spermatocyte
*Secondary spermatocytes

The first proposition is false because primary spermatocyte is diploid.
The second proposition is false too because secondary spermatocyte is haploid, which remains only the third proposition that is correct.