10 (e) Blood type p112
Human blood type is controlled by a gene with multiple alleles. There are four main blood types—A, B, AB, and O. Three alleles control the inheritance of blood types. The allele for blood type A and the allele for blood type B are codominant. Recall that when two codominant alleles are inherited, neither allele is masked. Notice that only people who inherit two i alleles have type O blood.