What is incomplete dominance? What is codominance? A. some offspring show the dominant trait and some show the recessive trait B. in both cases the phenotype changes during development C. the phenotype is a blend of parental traits; both parental traits appear

The correct answer is C: "the phenotype is a blend of parental traits; both parental traits appear". In the case of incomplete dominance, both traits appear in an intermediate phenotype. In the case of codominance, both alleles can be expressed.

Explanation:

Incomplete dominance is a condition where neither of the alleles completely dominates over the other one. Dominant alleles cannot completely cover up the recessive alleles. Descendents possess an intermediate phenotype between the two parental phenotypes and not the dominant one, which would appear if this would be the case of complete dominance. In codominance, both alleles can be expressed. In these cases, heterozygote individuals instead of showing an intermediate phenotype, express both of the alleles. Their phenotype is an additive expression of their parents' genes.