In humans, a. How many sperm develop from 100 primary sper matocytes? b. How many sperm develop from 100 secondary spermatocytes

In males, primary spermatocytes undergo two rounds of meiotic division. The first division yields two secondary spermatocytes, while the second meiotic division generates four spermatids from two spermatocytes. Thus: a. From 100 primary spermatocytes, 400 sperm will result (100*4=400). b. From 100 secondary spermatocytes, 200 sperm will result (100*2=200). c. Spermatids do not undergo further division; instead, they differentiate into mature sperm, so 100 spermatids will result in 100 mature sperm. d. A single primary oocyte produces one secondary oocyte, which in turn gives rise to only one mature ovum, therefore, only one mature ovum is produced from 100 primary oocytes. e. 100 secondary oocytes will yield 100 mature ova. f. Polar bodies degenerate over time and do not develop into ova, thus no ova will form from 100 polar bodies.