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We are looking for the possible blood types of a baby.

Parental information:

  • Mother type A pos -- genetically AA or AO and Rh (++) or (+-)
  • Father type O neg -- can only be OO and Rh (--)
Baby receives one gene from each parent:
  • Baby is type AO (+-) = Type A pos
  • Baby is type AO (--) = Type A neg
  • Baby is type OO (+-) = Type O pos
  • Baby is type OO (--) = Type O neg
NOTE: There is no gene B here to make the AB blood.

Generally the baby will be either Type A pos/neg or Type O pos/neg.

HOWEVER: There is more to ABO blood typing that just the ABO gene.

There is also an inhibitory gene that will change any genotype into the phenotype O.

Therefore a person with genetically AB blood can be tested as having Type O.

  • What if baby is Type AB?
If type O parent has the inhibitory gene affecting his BB, BO or AB type,

then the Type AB baby is definitely possible.

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Wiki User

10y ago
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Wiki User

14y ago

No it cant be possible because the parent which have AB group will either donate A or B so the blood type of a child with one parent of AB cant be O

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Q: Can a child that has a blood type of O have at least one parent that is AB?
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Continue Learning about Natural Sciences

Do your children have to have same blood as you?

No - children do not have to have the same blood type as the parents. For example, if one parent has blood type A and the other has blood type AB, the child might have A, B or AB blood types. (For the child to have B, the parent with blood type A would need to be heterozygous, Ao)


What type of blood does a child make is one parent blood type is O positive a the other is a positive?

The child could be A+ or O+.


Can an O positive blood type parent produce an AB negative blood type child?

yes


Can an B positive blood type mother and an B positive blood type father parent an A positive child?

No. The child will be type B or O, it cannot be type A.


What is blood alleles - please explain in easy language and with example?

Blood alleles are the genes that determine what kinds of proteins will be present on the surface of red blood cells, which are called antigens. These alleles determine blood type - A, B, AB or O. There are actually only two proteins that are present in human blood, A and B. Type O blood is an absence of either A or B proteins. Therefore, blood type is determined by the genes you inherit from your parents. All humans carry two alleles. For example, one person may have one allele for A type blood and another allele for no protein (O type). This person will have type A blood. Another person may have one allele for B type blood and another allele for no protein (type O blood) and would be classified as having type B blood. If these two people were to have children together, they would be able to produce children with all four blood types. This is because each parent would contribute one allele to the child. If the child received the A from parent 1 and the B from parent 2, the child would have type AB blood - both the A and the B proteins present on the child's red blood cells. If the child received the A from parent 1 and the O from parent 2, the child would have type A blood. If the child received the O from parent 1 and the B from parent 2, the child would have type B blood. If the child received the O from parent 1 and the O from parent 2, the child would have type O blood - no proteins present on the child's red blood cells.

Related questions

Can parents both blood type O have a child with A negative blood?

No, At least one parent would have to be an A (or an AB) for a child to have group A blood.


How can a child that is born with type AB blood?

the child takes the A gene from one parent and B from the other. And the both of parent are supposed to be AB blood type, or one A blood type and the other B.


Can parents both blood type b positive have a child with a blood type?

No. B type can only have B, O, and AB. A child with A blood would have to have at least one parent be A or AB.


Can b positive parent have child with a positive blood?

A B+ parent can have a child with A+ blood. The other parent must be type A or type AB for this to occur.


What type of blood will a child have if both parents are positive types?

The child will probably be positive, but they can be negative. Each parent has two genes for pos/neg blood type. The parent will have positive blood type if at least one of their genes is positive, but they could both also have negative genes to pass on to the child.


Can negative blood type parent and positive blood type parent have an Rh negative blood type child?

yes, absolutely


Could a parent with AB-blood type have a child with O-blood type?

No.


Can a parent with blood type B and a parent with blood type O have a child with blood type A?

well the answer and yes and no sometimes they have a and some times they don't


Can a parent with type a blood and a parent with type o blood have a child with type b blood?

well the answer and yes and no sometimes they have a and some times they don't


Can parents with O blood have b positive baby?

No, if both parents have O type blood they cannot have a child with B type blood. At least one parent would need to have type B or AB blood in order for the child to inherit a B allele.


Can a parent with O positive and a parent with O negative have any affect on the child?

If the mother has type negative blood, and the father and child have type positive blood, the mother's blood may begin to attack the child's.


Can an O negative blood type father parent an B positive blood type child?

no