Arrange the following cells according to their order of development in testis during spermatogenesis.
(A) Secondary spermatocytes
(B) Spermatids
(C) Primary spermatocytes
(D) Spermatogonia
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (D), (C), (A), (B)
Spermatogonia (D) form primary spermatocytes (C), which complete meiosis I to form secondary spermatocytes (A), which form spermatids (B).
NCERT Extract:
Gametogenesis – “… The spermatogonia (sing. spermatogonium) present on the inside wall of seminiferous tubules multiply by mitotic division and increase in numbers. Each spermatogonium is diploid and contains 46 chromosomes. 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).”