Mother and father of a person with ' 0 ' blood group have ' $A$ ' and ' $B$ ' blood group respective

Question

Mother and father of a person with ' 0 ' blood group have ' $A$ ' and ' $B$ ' blood group respectively. What would be the genotype of both mother and father?\

Professor PC Thomas Classes · Answer

(c): If mother and father of a person with ' 0 ' blood group have ' $A$ ' and ' $B$ ' blood group, then both mother and father will be heterozygous for ' $A$ ' and ' $B$ ' blood group respectively.\ The progeny with genotype 'ii' will have ' $O$ ' blood group.\