An example of a trait that results from incomplete dominance is ________; a trait that results from codominant alleles is __________:
A) sickle-cell anemia; blood type
B) leukemia; breast cancer
C) heart disease; liver cancer
D) multiple sclerosis; Lou Gehrig's disease

Question

Quizplus · Accepted Answer

Incomplete dominance is when the heterozygous phenotype is intermediate between the homozygous dominant and homozygous recessive phenotypes. Sickle-cell anemia is an example of incomplete dominance. Codominant alleles are when both alleles are expressed equally in the phenotype. Blood type is an example of codominant alleles, as both A and B antigens are expressed on the surface of red blood cells in the AB blood type. The other answer choices are not examples of incomplete dominance or codominance.

An Example of a Trait That Results from Incomplete Dominance