blood type genotype dominant or recessive
The A and B alleles are dominant to the O allele. When both inherited alleles are O, the genotpye is homozygous recessive and the blood type is O. When one of the inherited alleles is A and the other is B, the genotype is heterozygous and the blood type is AB.AB blood type is an example of co-dominance since both traits are expressed equally.1  Type A: The genotype is either AA or AO. 2  Type B: The genotype is either BB or BO. 3  Type AB: The genotype is AB. 4  Type O: The genotype is OO.B blood type is an example of co-dominance since both traits are expressed equally. 1  Type A: The genotype is either AA or AO. 2  The antigens on the blood cell are A and the antibodies in the blood plasma are B. 3  Type B: The genotype is either BB or BO.
Dominance in genetics is a relationship between alleles of one gene, in which the effect on phenotype of one allele masks the contribution of a second allele at the same locus. The first allele is dominant and the second allele is recessive.For genes on an autosome (any chromosome other than a sex chromosome), the alleles and their associated traits are autosomal dominant or autosomal recessive. Dominance is a key concept in Mendelian inheritance and classical genetics.he first allele is dominant and the second allele is recessive. For genes on an autosome (any chromosome other than a sex chromosome), the alleles and their associated traits are autosomal dominant or autosomal recessive. Dominance is a key concept in Mendelian inheritance and classical genetics.