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Human Reproduction

Question
CBSEENBI12002643
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The correct sequence of spermatogenetic stages leading to the formation of sperms in mature human testis is

  • spermatocyte-spermatoogonia-spermatid-sperms

  • spermatogonia-spermatocyte-spermatid

  • spermatid-spermatocyte-spermatogonia-sperms,

  • spermatogonia-spermatid-spermatocyte-sperms

Solution

B.

spermatogonia-spermatocyte-spermatid

In spermatogenesis, during growth phase some spermatogonia either due to growth or due to food storage become 2 or 3 times larger to their original size and are known as primary spermatocytes, which undergo meiosis- I and as result2 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).

Some More Questions From Human Reproduction Chapter

Which of the following shows hermaphroditism and self fertilization ?

The chromosone in primary spermatocyte are :

The male reproductive system is located in the body, in the :

Sertoli cells provide :

The middle piece of human sperm contains :

Seminiferous tubules open into vasa efferentia through :

Polar bodies are produced during the process :

In 28 days woman's menstrual cycle, ovulation occurs on :

Scrotum communicates with abdominal cavity through :

How many spermatozoa or sperms are present in human ejaculate ?

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