Individuals either have, or do not have, the Rhesus factor (or Rh D antigen) on the surface of their red blood cells. This is usually indicated by 'RhD positive' (does have the RhD antigen) or 'RhD negative' (does not have the antigen) suffix to the ABO blood type. Unlike the ABO antigens, the only ways antibodies are developed against the Rh factor are through placental sensitization or translation. That is, if a person who is RhD-negative has never been exposed to the RhD antigen, they do not possess the RhD antibody.[1] The 'RhD-' suffix is often shortened to 'D pos'/'D neg', 'RhD pos'/RhD neg', or +/-. The latter is generally not preferred in research or medical situations, because it can be altered or obscured accidentally. There may be prenatal danger to the fetus when a pregnant woman is RhD-negative and the biological father is RhD-positive.
Yes it is possible...
a-
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
Yes.
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 it is possible...
yes
A positive, O positive, A negative, or O negative; all are possible
If mother is heterozygote yes.
No.
yes its possible
Yes it is possible if the mother is A positive or A negative.
yes
Yes, if both parents have genotype AO.
Look at the Grandparents.