HEREDITY
INCOMPLETE DOMINANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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IAIi
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IBIi
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IiIi
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none of these
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Detailed explanation-1: -Someone with blood type AB must have both the A and B alleles. The genotype must be AB.
Detailed explanation-2: -For example, the ABO blood group system has three alleles that affect the expression of antigens on the surface of red blood cells: alleles A, B, and O. Both alleles A and B are expressed in individuals with the AB blood type.
Detailed explanation-3: -The A, B, AB and O blood group types in humans are determined by three alleles of a gene. The gene I, which determines the blood type, exists in three allelic forms, which are IA, IB and i.
Detailed explanation-4: -The four main blood groups A, B, AB, and O are controlled by three alleles: A, B, and O. As humans are diploid, only two of these can be present in any one genotype. In other words, only two of these alleles are present at the same time in a person’s cell.
Detailed explanation-5: -The ABO locus has three main alleleic forms: A, B, and O. The A allele encodes a glycosyltransferase that produces the A antigen (N-acetylgalactosamine is its immunodominant sugar), and the B allele encodes a glycosyltransferase that creates the B antigen (D-galactose is its immunodominant sugar).