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Yes they can.
Both blood groups and Rh factor holds two places. We see it in the AB blood group. The O blood group is OO. For A and B blood groups, the second place can be held by an O or A/B. So it can be BB/BO, AA/AO.
Just as with chromosomes, (X/Y) each parent gives one of their alleles to the child. If the child is born with A blood type, this would mean the Mother had BO blood type.
Now it's a matter of mix and match.
Mother gives B Father gives A Child will be AB.
Mother B Father B Child B
Mother O Father A Child A
Mother O Father B Child B
The Rh factor is the same principle. It also has two places. If both parents are Pos but the child is Neg, this means that both parents had to have an Rh factor +-.
Mix and match as above to see this.
I wouldn't be surprised if one of the grandparents was Rh Neg.
I hope this helps answer your question.
What else can I help you with?
Can an o positive father and a b negative mother have a child with a positive?
No. They can have an O positive, an O negative, A B positive, or a B negative child.
Can a o positive mother and a positive father make a a negative child?
no
O positive father and A negative mother what will child be?
o positive
Can a A positive mother and an O negative father have an A positive child?
yes
Can an A positive father and a B positive mother have a B negative child?
If the mother is A negative, and the father is B positive, they could have children who are A negative, A positive, B negative, B positive, AB negative, AB positive, O negative, or O positive.
If the DNA of the mother is A and the child is A pos what is the DNA of the father?
Given that the mother's DNA is A and the child is A positive, the father's DNA must also contain the A antigen. The father could be A positive, A negative, AB positive, or AB negative.
If mother is positive and father is negative is it possible the child would be negative?
If mother is heterozygote yes.
Can a o negative blood type father and a negative blood type mother have o positive child?
I'm not sure how negative or positive is determined, but a B mother and O father can have a B child.
Can o positive father and a positive mother have a negative child?
if your child is negative, i would ask for a blood sample from the mailman
Can a b positive mother and an o negative father have a b negative child?
no
Can an O negative father and a B positive mother have a O negative child?
no
Can an a positive mother and an a negative father make an o positive child?
Yes, the mother and father can have either an A or O child with the Rh factor of either - or +.
