Question

From heredity point of view, which marriage is not suitable?

• A. Man Rh (-) and Woman Rh (+)
• B. Both Rh (+)
• C. Both Rh (-)
• D. Man Rh (+) and Woman Rh (-)

Answer 1

The correct option is D Man Rh (+) and Woman Rh (-)

When a Rh-negative mother is impregnated by an Rh-positive father and is carrying an Rh-positive baby, the foetus Rh antigens will be perceived as foreign invaders in mother's body. It can initiate the protective mechanism that can end up harming the child during second pregnancy and is called as erythroblastosis foetalis. So, Rh (+) man and Rh (-)woman should be avoided in biological marriages.