What is the cell division in the zygote called?

$A$: Every cell of the body contains the same genetic material as the zygote. $R$: The zygote is formed by the fusion of male and female gametes.

$A$: All copulations do not lead to fertilisation and pregnancy.
$R$: Fertilisation can occur if the ovum and sperms are transported simultaneously to the ampullary-isthmic junction.

What is the significant function of the fertilizin-antifertilizin interaction?

The fertilizin chemical is present in

As a result of cleavage,if blastomeres are symmetrically placed around the polar axis,the type of cleavage is known as: