Dominant epistasis happens when thedominant allele of one gene masks the expression of all alleles of another gene. If an organism inherits one or two copies of the dominant allele, they will have the trait. ... Heterozygous means that two different alleles for a trait are inherited instead of two of the same allele.
we have been evolved through same root, during the process we get separated and develop new features to adjust in the surrounding atmosphere, that's why our genes are matching with fruit flies and others.
