Question

which of the two, sperms or ovum , decides the sex of the child? name the pair of sex chromosomes present in a boy child

Answer 1

The chromosome in the sperms decides the sex of the child.
The pair of sex hormones that is present in a boy child is "X" and "Y" chromosome.

Answer 2

sperms r responsible for determining the sex of a child.X and Y chromosomes r present in a boy child