Question

The immature male germ cell undergoes division to produce sperms by the process of spermatogenesis. Choose the correct statement with reference to above.

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

Answer 1

The correct option is (D):

Explanation of the correct option:

1. Secondary spermatocytes are produced after first meiotic division and have 23 chromosomes each.
2. These haploid secondary spermatocytes undergo the second meiotic division to produce four haploid spermatids.
   

Explanation of the incorrect options:

Option (A):

1. ​Spermatogonia is present in the walls of the seminiferous tubules.
   
2. The spermatogonia can only perform with the help of mitotic division that increases in numbers of spermatogonia.
   

Option (B):

1. Primary spermatocyte are few specific spermatogonia that undergoes first meiotic division.
   
2. This ​reduces the chromosome number to form two equal haploid cells called the secondary spermatocytes.
   

Option (C):

1. The spermatids are structurally modified to produce spermatozoa or sperms and not the other way round.
   

Final Answer: The correct statement is secondary spermatocytes have 23 chromosomes and undergo second meiotic division.