It's called "positive" and "negative" - yes the "A" father and "B" mother can each give a gene to produce "AB"; The Rhesus gene is either positive or negative so the baby could get either.
Mother is a plus child 0 plus what could father be?
Yes.
No
yes
yes, there is a chance to have a baby w/ A+
yes
If the mother and father are both type O, the baby cannot be type AB.
then the baby will be O plus, or AB plus , I think .
The baby's blood type would either be type A or type O. The father (phenotype A) could have an underlying genotype of either AA or AO. Therefore, the baby could have either type A (AO - with A from the father and O from the mother) or type O (OO - with O from the father and O from the mother) blood.
yes, it is possible.
Yes
yes can