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

Available information:

  • Mother type AB --can only be AB = contributes A or B gene
  • Baby type O -- can only be OO = has to receive an O from each parent
Baby receives one gene from each parent:
  • Mom type AB + Dad type AA/AO = Baby type AA, AB, AO, BO
  • Mom type AB + Dad type BB/BO = Baby type BB, AB, BO, AO
  • Mom type AB + Dad type AB = Baby AA, AB, BB
  • Mom type AB + Dad type OO = Baby AO, BO
Generally, since the AB parent cannot contribute an O gene, baby cannot be OO or Type O.

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.

If the baby's inhibitory gene has been turned "on", then no matter what ABO genes he receives from his parents, he will test out as a Type O.

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10y ago
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13y ago

no, its impossible ,because blood type AB contains antigen A and antigen B on the surface of red blood cells because genetically there are allele A and allele B in the gene so when the assortment of allels occure in meiosis there must be either allele A or B ,but in order to have O blood type there must be no alleles in the gene location.

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12y ago

No. O is recessive and must be homozygous to be expressed. If both parents were O, then this would be the only possible cross.

OO X OO

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Not disagreeing with, but adding on to the above: Unless something very unusual is going on, two type O parents would not produce type AB offspring. Having blood type O means that you carry neither the gene for type A nor the gene for type B; having blood type AB means you have both those genes -- so two type O parents would normally have a type O child, and a type AB child could come from one type AB parent and one parent of any blood type, or from one type A parent and one type B parent.

Unusual things that could happen to produce unexpected genetic blood-type results include a functional mutation that turns an un-expressed or faulty copy of the A or B gene in a parent into an expressed copy in the child, or chimerism or mosaicism, where some cells in a body (including, in our hypothetical, most of the blood-producing cells in one of the parents) are genetically different from other cells in that same individual (including, in our hypothetical, the gonads of that parent). These things are far less likely than an error either in the blood tests or in the attribution of parentage, but they do happen.

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11y ago

No, genes come in pairs, or at least for blood types, which means if your A you are really AA or AO, O is a recessive gene and is ignored unless it is OO, which is just O, so even if one of your parents is AO and the other AB, it is impossible to get the combination of OO.

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13y ago

yes it is possible that a child can get o blood from a parent with ab. =)=)=)=)=)

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11y ago

No - the child needs to inherit at least one of the parent's alleles. Therefore if the parent has blood type AB, they must donate either an A or a B to the child.

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10y ago

Babies inherit mostly in all but rare cases, only one of the blood type alleles A, B, or O from each mom and dad. So, even if each parent had type AB, the kid could have AA, AB, or BB blood.

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14y ago

yesType your answer here...

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15y ago

yes

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Q: Can A and AB blood type parent have baby with O- type?
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Mrs Smith has blood Type A her father has blood Type A and her mother has blood Type B. If Mr Smith has blood Type AB what is the probability that they will have a child with blood Type AB?

We are looking for the possible blood types of a baby.Parental information:Mrs Smith = Type AO = contributes A or O geneHer father Type A (AA/AO), Mother Type B (BB/BO)Mr. Smith = Type AB = contributes A or B geneBaby Type AB(?)Baby Smith receives one gene from each parent: Baby type AA,Baby type ABBaby type AOBaby type BOThe baby has a 25% chance of having Type AB blood.


Can a parent with ab blood type have a child with ab blood type?

We are looking for the possible blood types of a PARENT.Available information:Mother type AB --can only be AB = contributes A or B geneBaby type O -- can only be OO = has to receive an O from each parentBaby receives one gene from each parent: Mom type AB + Dad type AA/AO = Baby type AA, AB, AO, BOMom type AB + Dad type BB/BO = Baby type BB, AB, BO, AOMom type AB + Dad type AB = Baby AA, AB, BBMom type AB + Dad type OO = Baby AO, BOGenerally, since the AB parent cannot contribute an O gene, baby cannot be OO or Type O. 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.If the baby's inhibitory gene has been turned "on", then no matter what ABO genes he receives from his parents, he will test out as a Type O.


If the parents are Type AB and Type O could they produce an Type AB child?

We are looking for the possible blood types of a baby.Parental information:Mother type A --can be AA or AO = contributes A or O geneFather type O --can only be OO = contributes O geneBaby receives one gene from each parent: Baby is type AO = Type ABaby is type OO = Type OGenerally, to produce an AB baby, the A gene must come from one parent, and the B gene from the other. In this case, one parent is Type O and cannot provide the B gene. 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.If the Type O parent has the inhibitory gene affecting his B or AB type,then the Type AB baby is definitely possible.


Can a woman with type ab blood have a child with type o?

NO. Not at all. Each parent has an A or a B to contribute to the child. Therefore, the only possibilities for the child are: An A from each parent (making it an A) A B from each parent (making it a B) and An A from one, and a B from the other, (making it an AB). This a super-simple answer. For more detail on ABO blood grouping, type in ABO on wiki. NO. Not at all. Each parent has an A or a B to contribute to the child. Therefore, the only possibilities for the child are: An A from each parent (making it an A) A B from each parent (making it a B) and An A from one, and a B from the other, (making it an AB). This a super-simple answer. For more detail on ABO blood grouping, type in ABO on wiki.


Can a child with type o blood have parents with ab blood?

"No, if each parent has AB then the child can be A, B or AB but not O." Not exactly. Yes, it IS possible for a child with Blood type O to have a parent with the AB Blood type although it is extremely rare. There are different reasons for this. One is the Bombay blood group. There is also Chimera, or 'vanishing twin'. In certain Asian groups, some of these folks have a rare version of the ABO blood type gene called cis-AB. People with this gene version have an AB blood type but can easily have an O child. I am an O blood type child of an AB blood type parent, although we are not of Asian/European descent. I also have other siblings who are Blood type O so I know it is possible.

Related questions

What will a baby with parents who are ab and b blood type be?

If the parent's blood type is AB and B, the possible blood type of the baby is A, B, or AB.


What will happen to a baby when his father is blood type ab and his mother is blood type o?

If a parent's baby is having AB and O blood type, respectively, the baby's possible blood type will be A or B.


Can a type 0 baby have a ab father?

No. Neither parent can be AB blood type. Each parent must have at least one resessive gene for O blood type. Either parent could be type A or B or O.


If one parent has a bloodtype of AB-positive and the other has a blood type of AB-negative what are the possible blood types of their children?

We are looking for the possible blood types of the PARENTSAvailable information:Baby type AB Rh neg >> can only be AB (--)one parent contributed A(-) gene & other B(-) geneBaby receives one gene from each parent: note: Each parent can be Rh pos (+-) or Rh neg (--) >> assume the selection of (-)Mama AB + Papa AB = baby AB, AA, BBMama AA + Papa AB = baby AB, AAMama AA + Papa BB = baby ABMama AA + Papa BO = baby AB, AO,Mama AO + Papa AB = baby AB, AA, BOMama AO + Papa BB = baby AB, BOMama AO + Papa BO = baby AB, OOThere are 7 possible combinations of parents to produce a Type AB baby. Type AB baby is guaranteed with the Type AA and Type BB combination.


Can a child that has a blood type of O have at least one parent that is AB?

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 posBaby is type AO (--) = Type A negBaby is type OO (+-) = Type O posBaby is type OO (--) = Type O negNOTE: 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.


Can you be the father if the baby don't have mine nor the mother blood type?

Yes. A mother with blood type A (AO) and a father with blood type B (BO) can have a child with blood type O (OO), one O from each parent. An AB parent and a A (AO) parent can have an B child (BO), an AB and a B (BO) can have an A (AO). An AB parent can never have an O child because it requires two recessive genes and an AB parent cannot donate a recessive O.


If one parent has ab positive and one parent has o negative what type of blood will the baby have?

The baby could have almost any bloodtype except for O.


What blood type will the baby have with the mother B plus and father is AB plus?

If one parent is B+ and the other parent is AB +, the child could be any blood type except type O. If the genotype of the parent with phenotype B is known, more detail could be given.


Mrs Smith has blood Type A her father has blood Type A and her mother has blood Type B. If Mr Smith has blood Type AB what is the probability that they will have a child with blood Type AB?

We are looking for the possible blood types of a baby.Parental information:Mrs Smith = Type AO = contributes A or O geneHer father Type A (AA/AO), Mother Type B (BB/BO)Mr. Smith = Type AB = contributes A or B geneBaby Type AB(?)Baby Smith receives one gene from each parent: Baby type AA,Baby type ABBaby type AOBaby type BOThe baby has a 25% chance of having Type AB blood.


Mrs. Smith has blood type A. Her father has blood type A and her mother has blood type B. If Mr. Smith has blood type AB what is the probability that they will have a child with blood type AB?

We are looking for the possible blood types of a baby.Parental information:Mrs Smith = Type AO = contributes A or O geneHer father Type A (AA/AO), Mother Type B (BB/BO)Mr. Smith = Type AB = contributes A or B geneBaby Type AB(?)Baby Smith receives one gene from each parent: Baby type AA,Baby type ABBaby type AOBaby type BOThe baby has a 25% chance of having Type AB blood.


If the parents are blood Type AB and Type O could they produce an Type AB child?

We are looking for the possible blood types of a baby.Parental information:Mother type O --can only be OO = contributes the O geneFather type AB --can only be AB = contributes A and B genesBaby receives one gene from each parent: Baby is type AO = Type ABaby is type BO = Type BIn order for the baby to be Type AB (genotype AB) one parent must contribute an A and the other a B gene. Here we have a parent who is OO, and therefore can only contribute an O gene.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.If the Type O parent has the inhibitory gene affecting his Type A, B or AB blood, then the Type AB baby is definitely possible.


Baby Y has parents with AB and A blood types have a daughter with type A blood, what is baby Y’s genotype?

The blood type A is determined by having either two A alleles (genotype AA) or one A and one O allele (genotype AO). In this case, since the parents have blood types AB and A, they can only pass on an A allele or a B allele to their child. If the parents have a daughter with blood type A, it means they both contributed an A allele, as the daughter cannot have a B allele since her blood type is A. So, the genotype of the daughter is AO. Now, if we consider Baby Y, we can infer that Baby Y could inherit one A allele from one parent (let's say from the parent with blood type A) and one A allele or one B allele from the other parent (the parent with blood type AB). Therefore, Baby Y's genotype could be either AA or AB.