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Question

The immature male germ cell undergo division to produce sperms by the process of spermatogenesis. Choose the correct one with reference to above.

A
Spermatogonia have 46 chromosomes and always undergo meiotic cell division.
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B
Primary spermatocytes divide by mitotic cell division.
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C
Secondary spermatocytes have 23 chromosomes and undergo second meiotic division.
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D
Spermatozoa are transformed into spermatids.
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Solution

The correct option is B Secondary spermatocytes have 23 chromosomes and undergo second meiotic division.
Spermatogonia are diploid cells on the inside wall of seminiferous tubules that multiply by mitotic divisions. Some of the spermatogonia called primary spermatocyte undergo meiosis-I to give rise to secondary spermatocytes (haploid). Each secondary spermatocyte undergoes melosis-II to give rise to two haploid spermatids which are transferred to spermatozoa by spermiogenesis.

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