If the allele for Type O blood is recessive,and the alleles for Type A and B blood are dominant,which of the following individuals would have Type O blood?
A)a person with an AO genotype
B)a person with a BO genotype
C)a person with an OO genotype
D)all of these

Question

Quizplus · Accepted Answer

Type O blood is expressed only when an individual has two recessive O alleles (OO genotype). Therefore, only person C, who has an OO genotype, would have Type O blood. Persons A and B both have at least one dominant allele for Type A or B blood, which would be expressed in their phenotype.

If the Allele for Type O Blood Is Recessive,and the Alleles