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Biology 7 Online
ch3wyc00ki3:

Based on the genotype of AB blood, what relationship do the A and B genes have? A is recessive. B is recessive. They show incomplete dominance. They are codominant.

Vocaloid:

In blood types, the A gene codes for the production of A antigens and the B genes codes for B antigens. If someone is AB they will produce *both* A and B antigens. Because both alleles are expressed at the same time this is a codominant relationship.

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