Human Reproduction Ques 78
78. The correct sequence of spermatogenetic stages leading to the formation of sperm in a mature human testes is:
[2009]
(a) spermatogonia - spermatocyte - spermatids - sperm
(b) spermatid - spermatocyte - spermatogonia - sperms
(c) spermatogonia - spermatocyte - spermatid - sperm
(d) spermatocyte - spermatogonia - spermatid - sperm
Show Answer
Answer : a
Hints & Solutions
(a) The formation of sperms in mature human testes occurs in three important phases of gametogenesis: multiplication, growth, and maturation. During these phases, germ cells first change into spermatogonia, then into spermatocytes during the growth phase, which subsequently develop into spermatids, not spermatoids, before finally becoming sperm. Spermatogenesis takes approximately 74 days for the formation of mature sperm.
BETA
