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.
Yes. Blood types do not make parents incompatible.
A+ and A- A+ and O-
Yes, we all get our blood groups from our parents or grandparents.
No. They could have an A- child, but not A+.
The gentotype is ii that will produce blood type O. The allele i is recessive, so both parents must have at least one i allele, and the child must be ii (double recessive) to be blood type O. The parents' blood types do not have to be type O- the genotypes Ai (blood type A, as A is dominant), and Bi (blood type B) can produce blood type O offspring, as long as the child inherits the i allele.
It must have one of the true parents blood types.
No, because A & B are dominants.
No, they will have a O negative child.
a or o
ang hirap
No.
Yes. The geneotype for both parents must be AO+- for the child to be OO--