No, an O-group parent cannot have an AB-group child at all.
yes of course because b is the more dominant blood type. Because both parents are negative the the child will definantly have to be negative
yes
No. They can have an O positive, an O negative, A B positive, or a B negative child.
yes
o positive
no
No
If the mother is A negative, and the father is B positive, they could have children who are A negative, A positive, B negative, B positive, AB negative, AB positive, O negative, or O positive.
If mother is heterozygote yes.
I'm not sure how negative or positive is determined, but a B mother and O father can have a B child.
if your child is negative, i would ask for a blood sample from the mailman
no
no
yes.