What is the mode of inheritance where both traits from the parents are expressed independently?

Codominance is the mode of inheritance in which both traits from the parents are expressed independently and simultaneously in the offspring. This means that instead of one trait being dominant over the other, both traits manifest in a distinct way. A classic example of codominance can be observed in certain blood types, such as AB blood type, where both A and B alleles are fully expressed.

In incomplete dominance, one trait is not completely dominant over the other, leading to a blend of both traits in the phenotype (e.g., red and white flowers giving rise to pink flowers). Mendelian inheritance encompasses various inheritance patterns, but it primarily refers to traits controlled by single genes with clear dominant and recessive relationships. Autosomal dominant inheritance describes a pattern where one copy of the dominant allele is sufficient to express the trait, but it does not imply that both traits from parents are expressed independently. Codominance specifically highlights the simultaneous expression of both parental traits, making it the correct answer.