Explain how ABO blood types are inherited. Be sure to discuss how all the possible genotypes and phenotypes may occur.

Question

nebi · Answer

Blood types are inherited from both parents. Each parent donates one of their two ABO alleles to their child.  Both A and B alleles are dominant over O.  As a result, individuals who have an AO genotype will have an A phenotype.  People who are type O have OO genotypes.  In other words, they inherited a recessive O allele from both parents. The A and B alleles are codominant.  Therefore, if an A is inherited from one parent and a B from the other, the phenotype will be AB.