Yes, the possibilities are A pos or neg and O pos or neg, see the related link.
No, O is recessive and A is dominant.
No, they will have a O negative child.
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%.
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No.
Yes, in that "O" is the result of the dominant gene.
No, it is impossible to get an A-type from two O-types.
It must have one of the true parents blood types.
You could have several children with different blood types. you get your blood type from either parents or even grand parents.
Yes. They can have B+, B-, O+, and O-.
Yes. The geneotype for both parents must be AO+- for the child to be OO--
It is always possible, but normally not (as was the case with myself). The Child Can have A, B, or AB blood types.
Yes! Parents have two genes for pos/neg blood type, and only one of them needs to be positive for the parent to have positive blood type. Most positive-blooded people have one positive gene and one negative gene. If both positive parents pass on their negative gene, they can have a child with a negative blood type.