You answered your own question genius if the mother is O pos and father is A pos then I guess it is POSSIBLE!
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.
Yes. The father's phenotype is AO+*; the mother's is OO--.
No. The child will be type O+ or O-.
O positive
for sure
yes
no
Yes, the mother and father can have either an A or O child with the Rh factor of either - or +.
The father can be A-, A+, AB-, or AB+
yes
yes
Yes. The father's phenotype is AO+*; the mother's is OO--.
If the mother's genotype is AO, then it is possible that the child can be type O-
o positive
no
yes
If the father is O and the mother is A, the child can end up either A or O.If the father is O and the mother is AB, the child can end up either A or B.