This combination is possible if the father has type A blood with a genotype of AO.
A child whose parents are both type O positive may be type O positive or O negative, depending on the parents genotypes for Rh factor. There are no special medical risks.
# yes, if father is + - for RH and mother - - (negative) or + - (positive); the father can generate sons A, B, or AB depending by mother's group.
YES
yes
yes, the mother could o negative
can an o positive and an o negative make an a positive baby
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.
yes
Yes.
no
yes
o positive
no