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

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

Haryana PMTHaryana PMT 2010

Solution:

In spermatogenesis, during growth phase some spermatogonia either due to growth or due to food storage become $2$ or $3$ times larger of their original size and are known as primary spermatocytes, which undergo meiosis-I and as a result-$2$ haploid secondary spermatocytes are formed. Further, meiosis-II takes place that results in the formation of $4$-spermatids. Then, these round, non-motile and haploid spermatids are transformed into thread-like motile, haploid sperms (four).