$FSH$ acts on ........,which help in the process of spermiogenesis.

Meiotic division during oogenesis is different from that in spermatogenesis. Explain how and why?

How many spermatozoa are produced from a primary spermatocyte during spermatogenesis?

Ejaculation of human male contains about $200 - 300$ million sperms,of which for normal fertility . . . . . . $\%$ sperms must have normal shape and size and at least . . . . . . $\%$ must show energetic motility.

What happens upon the fertilization of the egg nucleus with the sperm nucleus?

Oogenesis comprises