Question

Co-dominance is seen in the person who has a blood group

• A. A
• B. B
• C. AB
• D. O

Answer 1

Answer: (C)

Co-dominance is the phenomenon is which both the alleles present in an organism express equally. Allele $I^A$ produces blood group antigen A while Allele $I^B$ produces blood group antigen B. When a person has genotype $I^A{I}^B$ both these genes are equally expressed and the body produces both antigens A and B. Such a person is said to have blood group AB