Codominance is a type of inheritance in which alleles of a gene pair that is heterozygous are expressed fully. Thus the resulting phenotype is neither dominant or recessive.
<em><u>Blood grouping is a good example of codominance; The genotypes; IAIA IAiO IBIB IBiO IAIB iOiO, are the blood types: A, A, B, B, AB, and O, respectively. Since both A and B are dominant to O, which is recessive, they share the trait when both expressed (type AB).</u></em>
IAIA IAiO IBIB IBiO IAIB iOiO These are the blood types: A, A, B, B, AB, and O, respectively. Since both A and B are dominant to O, which is recessive, they share the trait when both expressed (type AB). This is called [B. Codominance.]