Question

what is sex chromosomes?how many chromosomes there?

Answer 1

Sex chromosome is the chromosome that determines the sex of an individual. Chromosomes always exist in pairs. There are total 46 chromosomes, i.e., 23 pairs out of which one pair is the sex chromosome

Answer 2

Sex chromosomes are those chromosomes which helps to determine or to identify the sex of the child.
There are two sex chromosomes namely
X and Y.
There 23pairs of chromosomes.
In male both sex chromosomes are present where as in Female only X chromosome is present. If X chromosome of Male fused with X Chromosome of female then the sex of the child will be Female. If Y chromosome of Male fused with X chromosome of female then the sex of the child is Male.