A man having blood group 0 marries a woman having blood group B and they have a daughter. What will be the blood group of the daughter?
There are equal possibilities of the daughter having blood group O and B.
Blood group O will have O and O genes whereas blood group B will have B gene as dominant and O as recessive so the gene pairs that could be formed will be either O and B or O and O ; either B and O or O and O. Hence the equal possibility i.e. 50-50.