In mature oocytes cortical granules are formed on which side of plasmalemma
Outer
Inner
Upper
All the sides
Arrange in correct sequence the structures formed during spermatogenesis
$(a)$ Spermatogonia
$(b)$ Secondary spermatocyte
$(c)$ Primary spermatocyte
$(d)$ Spermatid
Define spermiogenesis and spermiation.
The figure shows a section of human ovary. Select the option which gives the correct identification of either $A$ or $B$ with function/ characteristic.
The secondary spermatocytes undergo the second meiotic division to produce four equal,
In humans, at the end of the first meiotic division, the male germ cells differentiate into the