How many sperms are formed from a secondary spermatocyte?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 2
Spermatogenesis has two meiotic divisions. A primary spermatocyte completes the first division and forms two secondary spermatocytes. Each secondary spermatocyte then undergoes the second meiotic division and forms two spermatids, so one primary spermatocyte gives four spermatids in all. Each spermatid is changed into one sperm by spermiogenesis, without any further division. So one secondary spermatocyte gives 2 sperms.
NCERT Extract:
Gametogenesis – “… Some of the spermatogonia called primary spermatocytes periodically undergo meiosis. A primary spermatocyte completes the first meiotic division (reduction division) leading to formation of two equal, haploid cells called secondary spermatocytes, which have only 23 chromosomes each. The secondary spermatocytes undergo the second meiotic division to produce four equal, haploid spermatids (Figure 2.5).”
Gametogenesis – “… The spermatids are transformed into spermatozoa (sperms) by the process called spermiogenesis.”

Figure 2.8 (a) Schematic representation of Spermatogenesis