Question

Is ABO blood grouping co-dominance?

Answer 1

ABO blood group:

1. Yes, the ABO blood group is an example of codominant genetic expression.
2. ABO blood group is the result of codominant expression of the A, B, and O alleles on the blood cells.
3. The genotype I^AI^B has alleles I^A and I^B that are codominant and equally expressed in the phenotype.
4. Whereas the O allele is recessive as it codes for an enzyme without any function.
5. People with the AB blood group have the A antigen and B antigen (polysaccharide) on the cell surface of their RBCs.