Question

Arrange the following stages of spermatogenesis in proper sequence of sperm development: A. Spermatids, B. Spermatocytes, C. Spermatogonia, D. Spermatozoa Choose the correct answer from the options given below:

• A. B, C, A, D \
• B. A, C, B, D \
• C. D, B, A, C \
• D. C, B, A, D

Hint:

Remember the alphabetized suffix progression: Spermatogonia (stem cells) $\rightarrow$ Spermatocytes (meiotic cells) $\rightarrow$ Spermatids (early haploid cells) $\rightarrow$ Spermatozoa (mature swimming sperm).

Answer 1

The Correct Option is D

Step 1: Concept Spermatogenesis is the step-by-step differentiation process that takes place inside the seminiferous tubules of the testes to turn diploid stem cells into mature, haploid male gametes.

Step 2: Meaning The cells mature in a strict sequence, progressing through mitotic proliferation, meiotic division, and structural remodeling.

Step 3: Analysis Let us follow the cells as they differentiate and mature: 1. The process begins with diploid undifferentiated stem cells called Spermatogonia (C) located near the basement membrane. 2. These cells grow and differentiate into primary and secondary Spermatocytes (B), which undergo meiosis. 3. Meiotic division produces haploid, undifferentiated round cells called Spermatids (A). 4. Finally, through spermiogenesis, these spermatids grow tails and discard excess cytoplasm to become mature, motile Spermatozoa (D).

Step 4: Conclusion The correct development sequence is C $\rightarrow$ B $\rightarrow$ A $\rightarrow$ D, which corresponds directly to option D. Final Answer: (D)