Question

please tell what is the concept of this

Answer 1

Hey !

This is the fusion of Male and Female chromosomes which leads to formation of the baby.

If XY then a girl is born.
If XX then a boy is born.

X and Y here are the chromosomes

HOPE THIS WORKS

Answer 2

The diagram given above is of the fission of male gamete ‘sperm’ and female gamete ‘ovary’

If it is XY then a baby girl is born
If it is XX then a baby boy is born