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There is no single answer to this question. First, how does the child get type AB? The child needs to get an A gene from one parent and a B gene from the other, simple as that. This means neither parent can be type O because they would not be able to pass on the A or B gene (that is what O means, the absense of the A or B gene). If one parent is type A, the other must be B or AB. If one parent is B, the other must be A or AB. Also, both parents can be AB. In all cases, one passes on the A gene and the other passes on the B gene, that's it.
Second, for the Rh factor (the positive and negative), the negative trait is recessive. This means the child must receive a negative gene from BOTH parents to display the negative phenotype. So the parents can be ANY Rh type. Why? Because it is a PAIR of genes, the GENOTYPE, that determines the trait. In the parents, they can be genotype +/- or -/+, meaning they have both the positive and negative gene and they can pass on the negative gene, but they will be POSITIVE Rh because that is the dominant trait. Of course, either parent could also be negative, -/- genotype, and they would certainly pass on the negative gene. So, you see, you cannot definitively type the parents in this case.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoYou can either be B negative, or O negative. You cannot be A, since it's a codominant type. You cannot be positive since negative is a recessive trait, and both parents must be negative/negative, then you must be as well. You could possibly be O negative if you inherit a recessive O from each parent.
Wiki User
∙ 12y agoThese combinations:
A+ and B+/B-
A- and B+
B+ and B+/B-
B- and B+/B-
B+ and O+/O-
B- and O+/O-
The A parents would have to be heterozygous for the A blood group.
The A+ parents would have to be heterozygous for the + rH factor.
The B parents could be homo- or heterozygous for the B blood group.
The B+ parents would have to be heterozygous for the + rH factor.
The O+ parents would have to be heterozygous for the + rH factor.
All the A, B, or O negative parents would be homozygous recessive for the negative rH factor.
Wiki User
∙ 16y agoAt least one parent would have to be B or AB. The other could be pretty much anything. Both could be either positive or negative.
Wiki User
∙ 11y agoNope - neither parent has the "A" allele, so you can't get an A blood type baby.
Wiki User
∙ 10y agoThe baby's blood type will be negative because the parent's blood type are negative
Wiki User
∙ 12y agoIf both parents are type B blood types then the child would have to be type B or type O. It would be impossable for the child to have a type A or type AB.
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Can a person that has o positive blood and a person with a positive blood make a child that has a negative blood?
CAN TWO POSITIVE BLOOD TYPES MAKE a negative blood type
How can doctors determine positive or negative blood types.?
Doctors can determine positive or negative blood types by administering a test. The difference between positive and negative types is the presence of the RH factor. Positive blood types indicate the presence of the RH factor while negative blood types do not have this factor.
What blood types can person with blood type A negative donate?
A person with A negative blood can donate blood to a person with A negative blood and a person with AB negative blood.
What are four types of blood types?
red blood cells,white blood cells,plasma and platelets maybe....
How many blood groups are there?
There are six types of blood type. Blood type A, B and O, all of these blood type can be positive or negative so giving the total number of blood type to be six.
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 a women with A negative and man with B positive produce child?
Yes. Blood types do not make parents incompatible.
What will a child's blood type be if parent's blood types are O negative and O negative?
Obviously, the child's blood type would be an O negative as well.
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 2 negative blood types have a child with positive blood type?
Nope
If the mother has a negative blood and the father is b negative does that make the child ab negative?
No. If both parents have a negative blood type, the child will either have the mother's blood type,or father's blood type, or if one parent is A- and the other B- only then can a child be born AB-. However, if two people with negative blood types try to have a baby, that may be very difficult. Sterility usually runs on the negative blood types, but conceiving a child is not impossible for them.
Can type a positive and a type b negative have o positive child?
No. For two reasons: an "A" and an "O" can never produce "B," and positve blood types will never yield a negative one.
Is it possible to have a child with o negative blood and mother o positive then father belongs to which blood group?
Both the O and Rh negative types are recessive to the other blood types and the Rh positive trait. Both parents can be any blood type except AB and produce a child with type O blood, and can both be Rh positive and produce a child with Rh negative blood type. Since recessive traits can be carried through multiple generations without ever manifesting as the phenotype, parentage can't be ruled out when recessive traits finally manifest under the right circumstances.
Can type a POSITIVE mother and o positive father have a b NEGATIVE child?
No. For two reasons: an "A" and an "O" can never produce "B," and positve blood types will never yield a negative one.
What is wrong with my baby's blood type?
If a child does not have the same blood type as either the father or the mother there is nothing to worry about. It is fairly common for a child to have a blood type that combines the blood types of the parents, such as an AB negative child whose parents had A negative and B negative blood.
Can a person that has o positive blood and a person with a positive blood make a child that has a negative blood?
CAN TWO POSITIVE BLOOD TYPES MAKE a negative blood type
When O positive man marries an A Negative girl will their child have health problems?
Mixing blood types will not any impact on the health of a child, only the resultant inherited blood type. This particular mix will produce a child with an A pos or A neg or O pos or O neg blood group.
