ABO blood group is an example of?: (A) Co-dominance, (B) AD, (C) AR, (D) Mitochondrial inheritance
Answer is A. a. Co-dominance(Ref: Nelson's 20/e p, Ghai 8/e p 641)Codominance--When both alleles of a gene pair are fully expressed in a heterozygote, e.g. blood group antigens.