Question

In spermatogenesis, reduction division of chromosome occurs during conversion of

• A. spermatogonia to primary spermatocytes
• B. primary spermatocytes to secondary spermatocytes
• C. secondary spermatocytes to spermatids
• D. spermatids to sperms

Answer 1

Answer: (B)

primary spermatocytes to secondary spermatocytes

Answer 2

The formation and maturation of male gametes or spermatozoon is called spermatogenesis. Sperms are produced in the seminiferous tubules oftestes. Diploid spermatogonia present beneath 3 to 5 cells deep from outermost layer of seminiferous tubules, increase their number by ordinary mitotic divisions and each becomes a primary spermatogonial cell or primary spermatocyte. Each primary spermatocyte undergoes first meiotic (reductional) division and forms two secondary spermatocytes. Each of these, without any intervention undergoes the second meiotic division and gives rise to two spermatids. Each spermatid undergoes the process of spermiogenesis to become a sperm.