O
25% to be B.
If the father has blood type AB and the mother has blood type O, the son can inherit one of two possible combinations of alleles: A from the father and O from the mother, resulting in blood type A, or B from the father and O from the mother, resulting in blood type B. Therefore, the son's possible blood types are A or B, but he cannot have blood type O or AB.
The mother can be type A or AB. She cannot be type O or B.
If the mother is type A or AB (either positive or negative), they could be father and son. Depending on the mother's blood type, an O- father could have a child who is: A+, A-, B+, B-, O+, or O-.
The father's blood type can be O, A, or B.
Yes
A DNA blood test will confirm whether or not you are indeed the father. Some DNA tests can be done with saliva as well, A child can have either the father's blood type, the mother's blood type, or a combination of the two. For instance, a father with type A+, along with a mother with blood type B-, can have A+. A-. B+, or B-.
it could be a- or ab+
The son is the maternal grandson of the mother of the father.
A father with the blood type can be b negative can have a child even a son that is A positive. The blood of a child comes from one or the other parent. If the mother is A positive the child can be as well.
The father can be type B or AB.