When two different alleles both express themselves in a heterozygous individual in a way that is different from the expression of either allele alone, these alleles are said to be:

Question

Quizplus · Accepted Answer

Codominant alleles are both expressed in the phenotype of a heterozygous individual, resulting in a phenotype that shows both traits simultaneously, unlike recessive or dominant alleles which do not express both traits equally.

When Two Different Alleles Both Express Themselves in a Heterozygous