Sperm and ovum originate from the . . . . . . .

What is the condition of oligospermia?

If $2n = 16$ in a primary spermatocyte which is in the metaphase of the first meiotic division,what shall be the total number of chromatids in each of the secondary spermatocytes?

Name the hormones involved in the regulation of spermatogenesis.

In human females,at the time of birth,there are approximately $2$ million primary oocytes. How many of them normally reach maturity during the entire reproductive life of a female?

Transformation of a young follicle into a Graafian follicle is controlled by: