People carry two copies of almost every gene, but they only pass one of them down to their children. Rh positive is dominant, meaning that if you have even one Rh positive gene, you will be positive.
Both parents can have one Rh positive and one Rh negative gene. If they each pass the Rh negative gene on to their child, the child will be Rh negative.
Theoretically:
If mother is Rh+ with homo alleles (Rh+Rh+) all children are Rh+.
If mother is Rh+ with hetero alleles (Rh+Rh-) 50% of children are Rh+ and 50% are Rh-.
That is not a problem as even if the baby is rhesus negative the mother will not react to it, nor will a negative baby react to a positive mother.
No
Yes. The father's phenotype is AO+*; the mother's is OO--.
possibility not
for sure
No they can not. two positives do not make a negative
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, if father is + - for RH and mother - - (negative) or + - (positive); the father can generate sons A, B, or AB depending by mother's group.
no
yes
o positive
no
No
Yes. The father's phenotype is AO+*; the mother's is OO--.
If mother is heterozygote yes.
The mother must be heterozygous b and the father must be both heterozygous b and heterozygous positive.
Yes, if the father is heterogeneous positive.