Codominance vs. incomplete dominance
A person with type AB blood expresses both A and B antigens on their red blood cells. This is an example of:
Answer B: explanation for every choice
A
Incomplete dominance produces a blended, intermediate phenotype, such as pink flowers from red and white parents.
B
Correct. In codominance, both alleles are fully expressed in the heterozygote.
C
Epistasis is one gene masking the effect of another gene.
D
Pleiotropy is one gene affecting several traits.
TakeawayCodominance: both shown fully. Incomplete dominance: a blend.
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Reviewed 2026-11-05 by a medical student. Spot an error? Report it with question ID bb53.