InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
Question : (a) How many spermatozoa are formed from one secondary spermatocyte? (b) Where does the first cleavage division of zygote take place? |
|
Answer» Solution :(a) A primary spermatocytes completes the first meiotic division (REDUCTION division) LEADING to formation of two equal haploid cells called secondary spermatocytes (each has n=23 CHROMOSOMES). The secondary spermatocytes undergo the second meiotic division to produce four equal haploid spermatids. (b) After 30 hours of fertilization when zygote PASSES from isthmus of OVIDUCT towards uterus, the mitotic division name cleavage starts and forms blastocysts. |
|