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NEET 2022 · BiologyPrevious Year Question

Which of the following statements are true for spermatogenesis but do not hold true for Oogenesis? (a) It results in the formation of haploid gametes (b) Differentiation of gamete occurs after the completion of meiosis (c) Meiosis occurs continuously in a mitotically dividing stem cell population (d) It is controlled by the Luteinizing hormone (LH) and Follicle Stimulating Hormone (FSH) secreted by the anterior pituitary (e) It is initiated at puberty Choose the most appropriate answer from the options given below: (NEET 2022)

Answer: (A) (c) and (e) only. Answer: (A) (c) and (e) only Solution: (a) haploid gametes and (d) LH/FSH control apply to both processes, so they cannot be the answer.

  1. A.(c) and (e) only✓
  2. B.(b) and (c) only
  3. C.(b), (d) and (e) only
  4. D.(b), (c) and (e) only

Correct Answer

(A) (c) and (e) only

Solution & Explanation

Answer: (A) (c) and (e) only Solution: (a) haploid gametes and (d) LH/FSH control apply to both processes, so they cannot be the answer. (c) is true only for spermatogenesis — spermatogonia keep multiplying by mitosis continuously, whereas no new oogonia are formed after birth. (e) is true only for spermatogenesis — it begins at puberty, while oogenesis is initiated during embryonic development. Thus only (c) and (e) hold for spermatogenesis but not oogenesis. NCERT Reference: Ch 2, p.31, line 17 — "(spermatogonia) produce sperms by spermatogenesis that begins at"

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