Yes. It would take too long to explain genotypes and phenotypes, just know that it is possible.
No if both parents are o+ they must produce o+ offspring
If both parents have genotype AO, it is possible to have a type O child, but this is very rare.
yes
No. The child would have A+
Yes, according to the site at the link below, a child can have A- blood, given parents of O+ and A+.
normally they have "o" plus or negative.
If both parents are O- then the child will be O-.
Yes, but with low percentage.
Yes. O, Rh positive and B, Rh positive parents may produce an O, Rh positive child.
A+ and A- A+ and O-
If both parents have genotype AO, then it is possible albeit rare for them to have a type O- child. If either parent is type AA, then the child will be type A.
Yes, it is possible for two parents, one with AB+ blood type and the other with O+ blood type, to have a child with O+ blood type. When two parents with different blood types have a child, the child's blood type can be a combination of the parents' blood types through genetic inheritance.