InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis isA. spermatogonia `rarr` spermatocyte `rarr` spermatid `rarr` spermsB. spermatid `rarr` spermatocyte `rarr` spermatogonia `rarr` spermsC. spermatogonia `rarr` spermatid `rarr` spermatocyte `rarr` spermsD. spermatocyte `rarr` spematogonia `rarr` spermatid rarr sperms. |
|
Answer» Correct Answer - 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. |
|