How is codominant inheritance different from incomplete dominant inheritance?
A. In codominance, two alleles are expressed equally; in incomplete dominance, there is only one allele in the system.
B. In codominance, two alleles are expressed equally; in incomplete dominance, heterozygotes have an intermediate phenotype.
C. In codominance, one gene is recessive to two dominant genes; in incomplete dominance, all genes are recessive.
D. In codominance, all genes are recessive; in incomplete dominance, one gene is recessive to two dominant genes.
E. In codominance, the two alleles cooperate to make an intermediate phenotype; in incomplete dominance, the heterozygote shows the recessive phenotype.
Answer (2)
Codominant inheritance results in both alleles being fully expressed in a phenotype, while incomplete dominance leads to a blending of traits. Codominance can be seen in blood types, while incomplete dominance is exemplified by the pink flowers of snapdragons. The main difference is the way the traits manifest in heterozygous individuals. ;
Codominant inheritance expresses both alleles equally in the phenotype, while incomplete dominance results in a blending of traits. An example of codominance is found in blood types, whereas incomplete dominance is illustrated by pink snapdragon flowers. Thus, the correct answer to the multiple-choice question is B.
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