The acrosome of a sperm is derived from which cell organelle?

What are the supporting cells found in the germinal epithelium of the testes called?

Select the odd one out.

The schematic representation of spermatogenesis is given below. How many chromosomes do $P$,$Q$,and $R$ contain?
$P$ (Spermatogonia) $\rightarrow$ $Q$ (Primary Spermatocyte) $\rightarrow$ $R$ (Spermatid)

How many polar bodies are produced during the process of oogenesis in a human female?

What does a mature sperm contain?