Question

Question 3
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

The dominance of a trait is tested over at least 3 generations. In the above discussed situation, data from only two generation is given. Hence it cannot be concluded which blood type is dominant.