Identify the correct sequence of given structures involved in spermat…

The correct answer is Option (2) → (D), (C), (B), (A)

(D) Spermatogonia — these come first. They are the diploid germ cells on the inside wall of the seminiferous tubules. They multiply by mitosis, and some of them become primary spermatocytes.

(C) Secondary spermatocytes — these come second. A primary spermatocyte completes the first meiotic division and forms two haploid secondary spermatocytes.

(B) Spermatids — these come third. Each secondary spermatocyte completes the second meiotic division, so four haploid spermatids are formed from one primary spermatocyte.

(A) Spermatozoa — these come last. The spermatids change into spermatozoa (sperms) by spermiogenesis. They are then released from the tubule by spermiation.

Note: A similar question was also asked in CUET (UG) 2026 on 20-05-2026 (Slot 2) and on 14-05-2026 (Slot 1), and in CUET (UG) 2025 on 27-05-2025 (Slot 2), on 20-05-2025 (Slot 2), on 20-05-2025 (Slot 1) and on 15-05-2025 (Slot 1).

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). … The spermatids are transformed into spermatozoa (sperms) by the process called spermiogenesis.”