Are blood type alleles codominant?

Is blood type codominance or multiple alleles?

But sometimes there is a codominance of alleles, which is when both alleles are expressed in the phenotype. Blood type is an example of both multiple alleles and codominance.

Is blood type incomplete or codominant?


The human ABO blood group system exhibits codominance. The system consists of three alleles A, B, and O. Both A and B are dominant in relation to O, and therefore blood group A can have the genotype AA or AO.

Are blood type A and B codominant?

The A and B alleles are codominant. Therefore, if an A is inherited from one parent and a B from the other, the phenotype will be AB. Agglutination tests will show that these individuals have the characteristics of both type A and type B blood.

Is blood type multiple alleles?

An excellent example of multiple allele inheritance is human blood type. Blood type exists as four possible phenotypes: A, B, AB, & O. There are 3 alleles for the gene that determines blood type.

Is human blood type incomplete dominance?

Alleles IA and IB for ABO blood type are neither dominant nor recessive to one another. Instead, they are codominant.

Do blood types show incomplete dominance?

The IA allele encodes the A blood group antigen, IB encodes B, and i encodes O. Both A and B are dominant to O. … Therefore, ABO blood groups are an example of: multiple alleles and incomplete dominance.

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What are the examples of Codominance?

Examples of Codominance:

  • AB Blood Type. People with this blood type have A and B proteins at the same time. …
  • Sickle-Cell Anemia. Sickle cell anemia is a disease where red blood cells become thin and stretched out. …
  • Horse color. The roan coat color of a horse is due to codominance. …
  • Flower colors.

Can a woman with blood type A and a man with blood type B have a baby with blood type O?

The O allele is recessive to both A and B, so if a person is AA or AO, their blood type is A, and if they are BB or BO, their blood type is B. Therefore, a person can only have blood type O if their genotype is OO.