Only his doctor would know.
of course.
Yes. Blood type should not be a factor in who you marry.
yes
Yes
it means positive group
that will lead to a serious disease and doctors shouldn't allow that to happen
possibility not
Yes, theoretically a person with AB+ blood group can accept blood of any other group. But practically it is not practiced.
normally they have "o" plus or negative.
Yes.... because blood trait A is dominant on blood trait O... the child will then have blood group A
yes
yes. all of the blood types can marry any other blood type.