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 Luteinising 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.
- A
(c) and (e) only
- B
(b) and (c) only
- C
(b), (d) and (e) only
- D
(b), (c) and (e) only
Compare each statement between the two processes.
(a) Both yield haploid gametes, so this is common to both. Excluded.
(b) In spermatogenesis, differentiation (spermiogenesis) occurs after meiosis is complete. In oogenesis, the cytoplasmic differentiation begins earlier and the secondary oocyte is released before meiosis II is complete. So (b) holds for spermatogenesis but not oogenesis.
(c) Spermatogenesis takes place in continuously dividing spermatogonia throughout adult life. In oogenesis, the oogonia stop dividing before birth, so no continuous mitotic stem cell population persists. So (c) is true only for spermatogenesis.
(d) Both processes are regulated by LH and FSH. Common to both. Excluded.
(e) Spermatogenesis begins at puberty. Oogenesis initiates in the fetal stage. So (e) is true only for spermatogenesis.
Hence (b), (c) and (e) are exclusive to spermatogenesis.
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