Yes.
yes
yes it may be
You cannot tell
The male contributes to the child being male or female.
it is unlikly, but posible
No as neither carry the B gene.
Male or female
Can a B- female and O+ male have a child? Yes
To "produce a baby", you need both a male and a female.
During first sonography a doctor can answer if a a child is male or female.
Negative is male, positive is female.
Yes, any one male and one female human can have a child (as we are all of the same species).