No, because A & B are dominants.
A+ and A- A+ and O-
It must have one of the true parents blood types.
Yes, they can have a child with blood type AB, which is the rarest of the four types.
No.
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.
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.
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.
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.
No. As long as one parent has an A allele (blood type AB or A) and the other has an i allele (blood type O, A* or B*), it is possible to have a type A child. (* means that the types have to be heterozygous)
In that given scenario, the possible blood types of the child are: A-, A+, O+ and O-.So Yes, it is possible to have a child with A positive with 25%.
The blood types of the parents have little or no bearing on whether they can conceive a child.
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).