Which genotype results in AB blood type and what type of dominance is exhibited between IA and IB alleles?

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Multiple Choice

Which genotype results in AB blood type and what type of dominance is exhibited between IA and IB alleles?

Explanation:
In ABO blood group genetics, the A and B antigens on red blood cells come from the IA and IB alleles. When someone has IAIB, both A and B antigens are produced and displayed, producing AB blood type. This pattern shows codominance, because neither allele masks the other; both are expressed together. If the genotype were IAIA, only the A antigen is produced; IBIB would produce only the B antigen, and ii would produce neither antigen (type O). So AB type arises from IAIB and reflects codominance between IA and IB.

In ABO blood group genetics, the A and B antigens on red blood cells come from the IA and IB alleles. When someone has IAIB, both A and B antigens are produced and displayed, producing AB blood type. This pattern shows codominance, because neither allele masks the other; both are expressed together. If the genotype were IAIA, only the A antigen is produced; IBIB would produce only the B antigen, and ii would produce neither antigen (type O). So AB type arises from IAIB and reflects codominance between IA and IB.

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