Question

A man with blood group A marries a woman with blood group O and their daughter has blood group O. Is this information enough to tell you which of the traits blood group A or O is dominant? Why or why not?

Answer 1

Blood group:

1. A trait's dominance is tested over at least three generations. In the aforementioned situation, data from only two generations are provided. As a result, it is impossible to determine which blood type is dominant.
2. The A and B blood groups are dominant in humans, while the O blood group is recessive.
3. However, in the preceding example, we cannot determine which blood group is dominant.
4. If the father's blood group is A, the genotypes would be homozygous AA or heterozygous AO.
5. Women with blood group O have homozygous OO and heterozygous AO genotypes.