A young lady with type O blood gave birth to a baby with type O blood. In a court case she claims that a certain young man is the father of her child. The man has type A blood. Could he be the father? Can it be proven on this evidence alone that he is the father?

Yes, He could be the father.

Explanation:

In this case, the mother of the child have OO genes and the father either have AA genes or AO genes, therefore the child could either be A or O but in this case the child is O.

The child inherited the O Gene from the mother and it was expressed phenotypically which makes the child to have O blood group.

Thr father have AO genes and the mother have OO genes which signify that the two parents contributed Their O genes and the baby inherited OO genes and that is the reason the child's blood group is O.

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