Question

Each secondary spermatocyte after the second meiotic division produces
a. Four haploid spermatids
b. Only one haploid spermatid
c. Two haploid spermatids
d. Two diploid spermatids
e. Four diploid spermatids

Answer 1

Hint: Spermatogenesis is the process of formation of spermatozoa from the germ cells, in humans, it occurs in the seminiferous tubules of the testes, where there are stem cells that differentiate to form the spermatogonial stem cells.

Complete answer:
- Spermatogenesis is the male version of gametogenesis, where the female version is called oogenesis.
- The formation of spermatids or gametes is mainly concerned with the ploidy of the cells.
- First, it begins with the spermatogonium, it is the diploid cells, which are the differentiated stem cells.
- From this spermatogonium, each diploid cell undergoes meiotic type I cell division, to produce the primary spermatocyte, the ploidy of the primary spermatocyte is again diploid.
- After the formation of primary spermatocyte, which is called spermatogenesis, there is another division that takes place
- In this type, the primary spermatocyte undergoes meiosis II type of division and this process is also called spermatogenesis, where two secondary spermatocytes are formed, where they are haploid in nature.
- Each secondary spermatocyte undergo a process called spermiogenesis to produce two spermatids, if it is 2 secondary spermatocytes, it forms 4 spermatids, and this are also haploid in nature
- Finally, these spermatids by the process of spermination form the functional spermatozoa.

Hence, the correct answer is option (C).

Note: The cell division in reproductive cells is mostly meiotic because the fertilization occurs by fusion of two types of reproductive cells, so to maintain its ploidy and at the same time all the crossing over happens in the meiotic division.