Individuals whose blood type is A and who carry both dominant and recessive genes at this locus have a genotype of:
A) AA.
B) AO.
C) AB.
D) none of the above

Question

Quizplus · Accepted Answer

Individuals with blood type A have the A antigen on their red blood cells. This antigen is encoded by the A allele of the ABO gene. Individuals who are heterozygous for the ABO gene have one A allele and one O allele. The A allele is dominant to the O allele, so individuals with the AO genotype will have blood type A.

Individuals Whose Blood Type Is a and Who Carry Both