Question

I know about the blood types, which ones are which, and I know how to fill out a Punnett Square, but how do you turn Ao and Bo and such from a genotype to a phenotype?

Answer 1

Their genotype is either AA or AO. Similarly, someone who is blood type B could have a genotype of either BB or BO. A blood test of either type AB or type O is more informative. Someone with blood type AB must have both the A and B alleles.

Human Genetics: ABO Blood Group - Th

Answer 2

Answer:

genotype → phenotype is also "blood group B" ... But you can't always know the exact genotype (the 2 specific alleles).