Zoology - Principles of Inheritance and Variation Question with Solution | TestHub

ABO blood group system is controlled by 3 different alleles${\mathrm{I}}^{\mathrm{A}}$,${\mathrm{I}}^{\mathrm{B}}$and i. A person with blood group A may have genotypes${\mathrm{I}}^{\mathrm{A}}{\mathrm{I}}^{\mathrm{A}}$or${\mathrm{I}}^{\mathrm{A}}\mathrm{i}$. The person with blood group B may have genotypes${\mathrm{I}}^{\mathrm{B}}{\mathrm{I}}^{\mathrm{B}}$or${\mathrm{I}}^{\mathrm{B}}\mathrm{i}$. The person with blood group O has genotype ii. Person with blood group AB has genotype${\mathrm{I}}^{\mathrm{A}}{\mathrm{I}}^{\mathrm{B,}}$so the person is definitely heterozygous.