ABO blood groups is a good example of co-dominance. Justify.
ABO blood group in humans is contributed by ‘I’ gene , that has three alleles and 'i'
- Because human beings are diploid each persons has two of three alleles.
- produce two different types of sugar while allele 'i' does not produce sugar on the plasma membrance of the RBC.
- When are present they both express their own type of sugar - this is codominance.