Codominance in ABO blood types is exemplified by individuals with genotype IAIB expressing both A and B antigens equally.
Codominance is characterized by the equal, distinct, and simultaneous expression of both parents' different alleles. In the case of ABO blood types, individuals with genotype IAIB exhibit both A and B antigens, illustrating codominance. This means that both antigens are expressed equally in the phenotype of the heterozygote.
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