Question:
Is ABO blood group system also the example of co-dominance?
Answer:
Codominance is a trait in which both alleles are dominant, neither of them is recessive. Hence both are expressed.
ABO blood types are an example of Codominance iA and iB are codominant while iO is recessive. Because of multiple alleles and their various dominance relationships, there are four phenotypics ABO blood types.
Type A is iAiA or iAiO
Type B is iBiB or iBiO
Type O is iOiO
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