Question

The spermatogonia undergo division to produce sperms by the process of spermatogenesis. Choose the correct one with reference to above.

• A. Secondary spermatocytes have $23$ chromosomes and undergo second meiotic division
• B. Spermatozoa are transformed into spermatids
• C. Spermatogonia have $46$ chromosomes and always undergo meiotic cell division
• D. Primary spermatocytes divide by mitotic cell division

Answer 1

The correct option is A Secondary spermatocytes have $23$ chromosomes and undergo second meiotic division

Spermatogenesis:

Spermatogenesis is the process of formation of sperms in the seminiferous tubules. The inside of the seminiferous tubules are lined with diploid male germ cells known as the spermatogonia which have $46$ chromosomes. Majority of these cells divide by mitotic division and increase their number. Some of these diploid spermatogonia, known as the primary spermatocytes, undergo first meiotic division. Each diploid primary spermatocyte divides to form two haploid secondary spermatocytes having $23$ chromosomes each. Both haploid secondary spermatocytes undergo second meiotic division and finally form four haploid spermatids, each of which carry $23$ chromosomes.

Spermiogenesis:

During the process of spermiogenesis, the spermatids undergo transformation within the seminiferous tubules to form spermatozoa or sperms.

Final answer

Option c.