Type 'O' blood is a recessive factor, which means that it can't be hiding anymore recessive factors hiding so no its not impossible.
Yes it is possible...
It is possible for there to be problems with a pregnancy. If mother's blood type is negative and the father's is positive, and the baby is positive, her blood type may begin to attack the child. Make sure she checks with her doctor regularly during a pregnancy.
You dad can either be O, AB, A,or B and he can be positive or negative.
it it possible if someone from either parents' family has had it or haves it because of genes
No
Yes.
YES
# 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 it is possible...
yes
yes
This combination is possible if the father has type A blood with a genotype of AO.
yes, the mother could o negative
A positive, O positive, A negative, or O negative; all are possible
If mother is heterozygote yes.
No.
yes its possible