Which is correct for oogenesis
Oogonia $\rightarrow$ secondary oocyte $\rightarrow$ ovum
Oogonia $\rightarrow$ primary oocyte $\rightarrow$ Ovum
Ovum $\rightarrow$ oogonia $\rightarrow$ secondary oocyte $\rightarrow$ primary oocyte
Oogonia $\rightarrow$ primary oocyte $\rightarrow$ secondary oocyte $\rightarrow$ ovum
Arrange in correct sequence the structures formed during spermatogenesis
$(a)$ Spermatogonia
$(b)$ Secondary spermatocyte
$(c)$ Primary spermatocyte
$(d)$ Spermatid
Release of sperm from the seminiferous tubules is called
$A$ : In spermatogenesis, the first haploid forms are spermatids.
$R$ : All the end of meiosis cells have haploid set of chromosomes.
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.
Female gamete mother cell are called