The parents must have both blood type B or blood type 0 and B.
It must have one of the true parents blood types.
No. The parents must both have the type O allele in order for their child to be O.
Yes. The geneotype for both parents must be AO+- for the child to be OO--
The child must have O as well.
Parents must be blood type A or O. Any other blood type will not result in a sole A type child. It might result in several other combinations though, which are not relevant to this question.
Blood type: O
No - this is not possible. The child must have one parent with an A allele in order to have type A blood. Neither of these parents have an A allele - so this is not possible.
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.
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+.
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.
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.
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.