Give a schematic labelled diagram to represent oogenesis (without descriptions).

In Spermiogenesis………

In testis, the immature germ cells produce sperm by $…A…$ at puberty $…B…$ present on the inside wall of seminiferous tubules multiply by$ …C..$. division and increase their number. Identify $A$,$B$ and $C$ from the above statement

At the end of first meiotic division, the male germ cells differentiate into

Movement of sperm is done by