AP BIOLOGY

Detailed explanation-1: -In codominance, neither allele is dominant over the other, so both will be expressed equally in the heterozygote.

Detailed explanation-2: -Closely related to incomplete dominance is codominance, in which both alleles are simultaneously expressed in the heterozygote. We can see an example of codominance in the MN blood groups of humans (less famous than the ABO blood groups, but still important!).

Detailed explanation-3: -Codominance occurs when both alleles show dominance, as in the case of the AB blood type (IA IB) in humans. Furthermore, the human ABO blood groups represent another deviation from Mendelian simplicity since there are more than two alleles (A, B, and O) for this particular trait.

Detailed explanation-4: -Because both alleles are expressed at the same time, their blood type is AB.

Detailed explanation-5: -If both alleles are dominant, it is called codominance?. The resulting characteristic is due to both alleles being expressed equally. An example of this is the blood group AB which is the result of codominance of the A and B dominant alleles.