Which of the following phenotypic characteristics is an example of "codominance"?
A) normal skin pigmentation
B) hair color other than pure blond or red
C) presence of Rh factor on red blood cell membranes
D) presence of A or B antigens on red blood cell membranes
E) ability to taste phenylthiocarbamate (PTC)

Question

Quizplus · Accepted Answer

Codominance occurs when two different alleles are both fully expressed in a heterozygous individual, leading to a phenotype that includes both alleles distinctly. The presence of A or B antigens on red blood cell membranes, as seen in blood types, is a classic example of codominance. Individuals with type AB blood have both A and B antigens fully expressed on their red blood cells.

Which of the Following Phenotypic Characteristics Is an Example of "Codominance