A man with blood type O married a woman with blood type A. The wife’s father has blood type O.

A man with blood type O married a woman with blood type A. The wife’s father has blood type O. What is the probability that children from this marriage will have blood type O? Blood group A?

A blood type is a specific combination of characteristics of red blood cells that is passed down to us from our parents. In 1900, scientist Karl Landsteiner discovered three blood groups in humans, and later Jan Jansky discovered the fourth blood group.

The exact blood group of the child cannot be determined; it can be assumed by knowing the blood groups of the parents.

If we assume that a man with blood type O married a woman with blood type A. The wife’s father has blood type O (and they all have (+) Rh factor), then the probability that the unborn child will have a blood type:

O (+) – 49%; O (-) – 7%; A (+) – 38%; A (-) – 5%; B (+) – 1%.