Question

Select the option which can produce 200 spermatozoa.

• A. only 100 primary spermatocytes are required
• B. only 200 secondary spermatocytes are required
• C. only 50 secondary spermatocytes are required
• D. only 200 spermatids are required

Answer 1

Answer: (D)

The maturation phase of spermatogenesis is broken into two processes - meiosis-I and meiosis-II. During this phase, diploid primary spermatocytes are reduced to haploid secondary spermatocytes, which further undergoes a second meiotic division to give four, equal haploid spermatids.
The spermatids are transformed into spermatozoa (sperms) by the process of metamorphosis called spermiogenesis. Each spermatid gives rise to one sperm.
Hence, for the production of 200 spermatozoa, only 200 spermatids are required.