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both parents carried the recessive gene for type O blood. the baby then inherited 2 recessive genes and received type O blood. the reason the parents didn't have type O blood is because they carried genes that were more dominant.

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15y ago
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14y ago

A and B because you cant have O if its not there in the beginning.

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Q: How could 2 parents with blood type A and B have a child with the blood type of O?
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Is there a posibility to have a child that is blood type -A A couple who are blood type B and blood type O?

No. It is not possible for a child to have A if the parents are O blood type. If both parents have type O blood, then their children will also have type O blood. However, two parents with type A or type B blood (both the same or one of each) can sometimes have a child with type O blood. That is because the gene for type O blood is recessive. But they must carry the O type. However, two parents with type AB blood can have a child with type A, type B, or type AB blood, but cannot have a child with type O blood.


If both parents are blood type o is it possible for their child to have a blood type a positive?

No, two type O parents can only have type O children. See the table below from www.dna-bioscience.co.uk/did_you_know_abo.shtml If you look at the row for mother's blood type O where it intersects with the column for father's blood type O, you will see that the child's blood type must be O. For the child to be Rh+, only one of the parents has to be Rh+.


Can 2 type o blood types have a blood type a child?

Parents of blood type O can only have children with blood type O. Because type O is recessive, you know that the parents are homozygous O.


If you have o negative blood do your parents have o blood too?

They could, but they don't need to. Both of your parents must have at least one O allele, meaning neither can have type AB blood. They must be either BO, AO or OO to produce a child with type O blood.


Can type o mother and AB father have an o child?

Not normally. Father can only contribute an O. Mother can contribute a B, or perhaps an O (if she has BO genes). Child would be either O or B (with BO genes). However, rare exceptions do exist.

Related questions

Could a child with type B blood have parents that are both type A blood?

Only if it was adopted...the only options for that child's blood type would be A or O if the biological parents are both Type A.


If both parents have A blood type can they have a child with o blood type?

Yes. Both parents could be heterozygous, that is AO, and pass on the O to their child.


If a woman with O blood has a child with a man with B blood could the child be A blood?

No, the child has to have one of the parents blood type.


How could two parents with blood types a and b have a child with o?

If the parents had the genotypes AO and BO, then they could have a child with Type O blood (there would be a 25% chance of this occurring).


If both parents have 0 positive blood types could child have type A?

No.


Is it possible for two parents with type B blood to have with type O blood?

I assume the question is "Is it possible for two parents with type B blood to have a child with type O blood?" Yes they can, if both parents have BO genotype. The chance of the child having O blood is 25% in this case. Source: http://en.wikipedia.org/wiki/Blood_type


Is there a posibility to have a child that is blood type -A A couple who are blood type B and blood type O?

No. It is not possible for a child to have A if the parents are O blood type. If both parents have type O blood, then their children will also have type O blood. However, two parents with type A or type B blood (both the same or one of each) can sometimes have a child with type O blood. That is because the gene for type O blood is recessive. But they must carry the O type. However, two parents with type AB blood can have a child with type A, type B, or type AB blood, but cannot have a child with type O blood.


How could parents with blood type A and B have a child with blood type O?

If both parents had heterozygous blood-type genes, then the child could inherit the recessive O type from each parent. Suppose the mother had the genes for A and O, and the father had the genes for B and O. They would then have blood-types A and B respectively. Depending on which parts were passed to the child, any blood type would be possible.


If you have O positive blood and your panter has O neg. blood what would your kids have?

It is hard to tell if your blood type is dominate and your partners blood type is recessive them the child could have O positive blood, but if your blood type is recessive and your partners blood type is dominate then the child could have O negative. Sometime the child could get a completely different blood type eve if their parents do not have it. There is no way you can tell.


How can a child's blood type be b positive if mom is b positive and dad is a positive?

You could have several children with different blood types. you get your blood type from either parents or even grand parents.


How is a child's blood type determined?

The child's blood type is determined by his or her parents' blood types. If both parents have type A, the child can have either type A or O. If both parents have type B, the child can have either type B or O. If one parent has type A and the other parent has type B, the child can have type A, B, AB, or O, but he/she is most likely to have type AB. If both parents have type O, the child will have type O.


Can parents with o blood type to have a child with b blood type?

If both parents are type O blood they will only have type O children