Spermatogonia undergo a series of cell divisions to produce sperms. Select the correct statements from the following : A. Spermatogonia always undergo meiotic cell division. B. Primary spermatocytes divide mitotically to produce secondary spermatocytes. C. Secondary spermatocytes, through their seco

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Spermatogonia undergo a series of cell divisions to produce sperms. Select the correct statements from the following : A. Spermatogonia always undergo meiotic cell division. B. Primary spermatocytes divide mitotically to produce secondary spermatocytes. C. Secondary spermatocytes, through their second meiotic division, produce haploid spermatids. D. Spermatids produce spermatozoa through mitosis. E. Spermatids transform into spermatozoa by spermiogenesis. Choose the correct answer from the options given below :

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Correct answer: B. C and E only

Spermatogonia present on the inside wall of seminiferous tubules multiply by mitotic division and increase in numbers. Thus, statement A is incorrect. 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. Thus, statement B is incorrect. The secondary spermatocytes undergo the second meiotic division to produce four equal, haploid spermatids. Thus, statement C is correct. The spermatids are transformed into spermatozoa (sperms) by the process called spermiogenesis. No cell division (mitosis) occurs during this transformation. Thus, statement D is incorrect and statement E is correct. Therefore, only statements C and E are correct. Answer: C and E only

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