Question

what is the genotype of a person with blood group A

Answer 1

If someone has blood type A, they must have at least one copy of the A allele, but they could have two copies. Their genotype is either AA or AO.

Answer 2

If someone has blood type A, they must have at least one copy of the A allele, but they could have two copies. 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.

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