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It's impossible to give a definite answer to that because both parents inherit their blood-genes from THEIR parents and can also have genes for negative and positive rhesus factors in their blood. Positive rhesus factor tends to be dominant but the blood group can't be identified with any accuracy this way.

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Can an B positive blood type mother and an B positive blood type father parent an A positive child?

No. The child will be type B or O, it cannot be type A.


What blood type would a child be with a AB neg mother and O positive father?

The child would most likely have either blood type A positive or B positive. A child inherits one blood type allele from each parent, so with an AB negative mother and an O positive father, the child could receive the A allele from the mother and the O allele from the father, resulting in blood type A positive. Alternatively, the child could receive the B allele from the mother and the O allele from the father, resulting in blood type B positive.


Can a B positive father and b negative mother give birth to AB positive child?

Yes. If the father is the AO variety of A, he can contribute an O and the mother can contribute the B, making a BO variety of B for the child. And, the father can give the Rh positive while the mother gives an Rh negative, which will be an Rh positive.


If mother blood is b negative and father blood is ab positive what is child's possible blood group?

If the mother's genotype is BB, the child can be type B or AB (50/50 chance). The child cannot be type A or O. If the mother's genotype is BO, the child can be any type, tho B or AB is more likely. The Rh factor is likely positive but can be negative. So, without knowing the mother's genotype, and the father's specific Rh factor (++ or +-), we cannot be sure.


Can a o positive mother and o negative father have a b negative child?

Yes, it is possible for an O positive mother and an O negative father to have a B negative child. The child would have inherited one O gene from the mother and one O gene from the father, but could have received a B gene from each parent, resulting in a B blood type. The negative Rh factor would have also been inherited from the father.