When a man with blood type A marries a woman with blood type B, they can have a kid who has blood type O.
a method for classifying distinct kinds of human blood according on whether or not the red blood cells' surfaces contain certain markers. Blood comes in four different types: A, B, O, and AB.
A kid with the blood types A, B, AB, or O can result from having an A parent and a B parent. If one parent has blood type A and the other has blood type AB, the kid will either have the blood type A, B, or AB. If one parent has blood type A and the other has blood type O, the kid will either have blood type A or O.
If a man with type A blood marries a woman with type B blood. Their child is blood type O, reason is the genotypes of the parents will be AO and BO.
Thus a man with A blood type marries a woman with B blood type can produce o type blood child.
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