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The correct sequence of spermatogenetic ...

The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is

A

spermatogonia `rarr` spermatocyte `rarr` spermatid `rarr` sperms

B

spermatid `rarr` spermatocyte `rarr` spermatogonia `rarr` sperms

C

spermatogonia `rarr` spermatid `rarr` spermatocyte `rarr` sperms

D

spermatocyte `rarr` spematogonia `rarr` spermatid `rarr` sperms.

Text Solution

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The correct Answer is:
A
In human males, the primordial germ cells divide mitotically and produce spermatogonia. Some of the spermatogonia grow into large primary spermatocytes. Each perimary spermatocyte undergoes first maturation division which is a redutional (meiotic) one. Thus, the primary spermatocyte divides into two haploid daughter cells called secondary spermatocytes. Each secondary spermatocyte now undergoes second maturation division which is a mitotic one. Thus, each secondary spermatocyte gives rise to two spermatids that undergo transformation to form two sperms. Overall, two secondary spermatocytes give rise to four sperms.
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