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It really depends on what the other parents blood type is. One's Rh factor comes from both parents, one factor (for lack of a better word) from each parent. Someone who has a positive blood type has inherited either two positive factors from their parents (++), or one positive, one negative (+-) . Someone with a negative blood type has inherited two negative factors (--). SO...If one parent has a negative blood type (--), they could produce a child with a positive blood type if the other parent had a positive blood type, either (++) or (+-). If both parents are type negative (--), then technically it shouldn't happen that they would have a child with a positive blood type.
Pictures below to demonstrate:
http://www.childrenshospital.org/azSite639Imagesei_0375.gif
http://www.childrensnyp.orgmschonyimagesui_0377.gif http://www.childrensnyp.orgmschonyimagesui_0378.gif Basically they are saying its not your kid and you need to get DNA to prove it.
Additional Information: The O blood type is caused by a dominant gene. Two genes for blood type are inherited by a child, one from each parent. Here are the combinations of the genes that can be inherited and the blood types that will result: O and (A or B or O) -> O A and A -> A A and B -> AB B and A -> AB B and B -> B The "positive" or "negative" part is a separate issue.
pos and pos -> pos pos and neg -> pos neg and pos -> pos neg and neg -> neg Keep in mind that a person may have type O blood, but have a recessive gene for type A or for type B that is being "hidden" by the O. The same goes for the positive/negative gene -- if you have a gene for positive, it will "hide" a gene that you may have for negative.
I have type A+ blood and my husband has O+ blood. Our son is A+, so obviously my husband's genes are for O and A. (Since I have type A blood, my genes are both for A.) Our daughter is A-. So both children got 2 genes for type A. Both of us must have the "one gene for positive/one gene for negative" situation. Our son got at least one gene for positive. Our daughter got both genes for negative.
What else can I help you with?
Can a A negative and B negative parental blood types produce a A positive child?
No. They could have an A- child, but not A+.
Can an O positive blood type parent produce an AB negative blood type child?
yes
Can a father produce a child with o positive blood and another child with o negative blood?
Yes, we all get our blood groups from our parents or even our grandparents.
What type of bloodType o posetive and o negative can produce a child with what type of blood?
O positive or O negative.
Can parents who have B negative and O positive blood types have a child with O positive blood?
No, they will have a O negative child.
Can a a positive father and a o negative mother produce a a negative child?
Yes, if both the mother and the father are carriers of the recessive Rh negative trait, they can produce a child with O negative blood type. The child would inherit one Rh negative allele from each parent, resulting in a negative blood type.
Can a women with A negative and man with B positive produce child?
Yes. Blood types do not make parents incompatible.
Can a father with A-negative blood have a child with A-positive blood?
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.
Can parents with b positive and a negative blood have a child with o positive blood?
Yes, you very much can have a child with O positive blood.
If the mother has B positive blood and the father has O negative what would the child's blood type be?
B positive or negative or, O positive or negative.
Can an AB Positive blood type mother and an O Positive blood type father have an A negative child or a B negative child?
Yes to both.
Is it possible for a child to have O negative blood if the mother has A positive blood and the father has A positive blood?
No.
