Mammalian sperm cells are highly specialized male gametes produced only for the function of fertilization. During spermatogenesis, these cells lose several subcellular entities and retain only those which are absolutely essential. Therefore, the mature sperm cells from humans will contain

Identify the cells represented as $\mathrm{P},\mathrm{Q},\mathrm{R}$ and $\mathrm{S}$ in the given schematic representation of spermatogenesis.

In the given diagram of human sperm, identify the functions of the labelled parts. $\mathrm{a}, \mathrm{b}$ and $\mathrm{c}.$

Identify the cells represented as $\mathrm{p},\mathrm{q},\mathrm{r}$ and $\mathrm{s}$ in the schematic representation of Oogenesis, shown below and choose the correct option.

Study the following

Among the above, correct combination are

What is the correct sequence of sperm formation ?