Which of the following describes codominance?

Codominance is a specific form of inheritance where both alleles in a heterozygous organism are fully expressed, allowing for the characteristics associated with each allele to be presented simultaneously without blending. This results in offspring displaying both traits distinctly rather than exhibiting a mixture of them.

A classic example of codominance is seen in certain blood types in humans, particularly AB blood type, where both A and B alleles are expressed equally. This characteristic is different from complete dominance, where one allele completely masks another, or incomplete dominance, where the traits blend. Codominance clearly illustrates how both alleles contribute to the phenotype, making it essential for understanding genetic variation and the functional dynamics of alleles within a population.