Question

Two childrens of same parents are called _________​

Answer 1

Parents don't pass genes to their offspring, they pass chromosomes. Every cell in a father contains a set of genes that are exactly alike. The same thing is true with every mother. ... Hence the child gets new chromosomes, the genes in which contain a mix of both their father's and mother's genes.
two children of same parents called siblings

Answer 2

Two childrens of same parents are called siblings.

The mixture of both means father and mother parents genes.