what is two recessive genes called
Organisms that reproduce sexually have two copies of each gene, one from each parent. These matching gene pairs are called alleles. A dominant allele masks the expression of the recessive geneâs trait.The alleles are homozygous if they code for the same trait and heterozygous if they code for different traits. A homozygous pair might have two dominant or two recessive alleles.Dominant genes are indicated by capital letters, recessives by small letters.he alleles are homozygous if they code for the same trait and heterozygous if they code for different traits. A homozygous pair might have two dominant or two recessive alleles. Dominant genes are indicated by capital letters, recessives by small letters.