Question

What is the correct sequence of sperm formation?

• A. Spermatogonia→ Spermatocyte→ Spermatid→ Spermatozoa
• B. Spermatogonia→ Spermatozoa→ Spermatocyte→ Spermatid
• C. Spermatogonia→ Spermatocyte→ Spermatozoa→ Spermatid
• D. Spermatid → Spermatocyte → Spermatogonia → Spermatozoa

Answer 1

The correct option is A

Spermatogonia→ Spermatocyte→ Spermatid→ Spermatozoa

The correct option is A

Explanation of the correct option:

1. Sperm formation is called spermatogenesis.
2. Spermatogonia are present in the wall of the seminiferous tubules. These are diploid (2n) and divide by mitosis.
3. The spermatogonia divide into diploid (2n) spermatocytes. These are also called primary spermatocytes.
4. The primary spermatocytes undergo meiosis and produce secondary spermatocytes (n).
5. There are two secondary spermatocytes formed which again divide by the second meiotic division.
6. The secondary spermatocytes form four spermatids during the second meiotic division. The spermatids are also haploid.
7. The four haploid spermatids finally produce four haploid sperms by the process of spermatogenesis or spermiogenesis.

Final answer: The correct sequence of sperm formation is $\mathrm{Spermatogonia}\to \mathrm{Spermatocyte}\to \mathrm{Spermatid}\to \mathrm{Spermatozoa}.$