That is always possible if both the parents are heterozygous for Rh antigen gene. It means that both the parents. There are 2 different alleles for the Rh factor known as Rh+ and Rh-.Someone who is "Rh positive" or "Rh+" has at least one Rh+ allele, but could have two. Their genotype could be either Rh+/Rh+ or Rh+/Rh-. Someone who Rh- has a genotype of Rh-/Rh-. If their genotypes are Rh+/Rh-, then their is possibility of of Rh- also.
Rh factor
Possible genotypes
Rh+
Rh+/Rh+
Rh+/Rh-
Rh-
Rh-/Rh-
Prof. A.L. Bhatia
http://www.competition-India.blogspot.com/
http://www.albhatia.in
Type O blood is also recessive to type A, so both parents could be heterozygous type A's. Their genotypes would have to be A/O.
Yes, it is possible for a mother with A positive blood and a father with O positive blood to have a baby with A negative blood. The baby would inherit one A allele from the mother and one O allele from the father, resulting in A negative blood type.
Yes, a father with A negative blood can have a child with A positive blood. If he does, the mother must have a positive Rh factor, and the mother's blood type may be any of the possibilities.
No.
yes.
B positive or negative or, O positive or negative.
Yes, a mother with negative and a father with O positive can have a baby with B positive. If they do, the mother must have blood type B or AB.
yes
95% not.
I'm not sure how negative or positive is determined, but a B mother and O father can have a B child.
yes
No
No, because a baby gets their blood from their father, not their mother.