Yes
Only if he's adopted. Parents with a + blood type can have children with a - blood type, but parents with an O bloodtypes can only have O type children together.
If both parents are type O blood they will only have type O children
both parents could be A heterozygous or one A heterozygous and the other O
If both parents are O- they can only have O- children.
If both parents have blood group A, their children can have blood groups A or O. This is because the A blood group can be either AA (homozygous) or AO (heterozygous). If both parents are AA, all children will be A. If both are AO, children could be A or O. If one is AA and the other AO, children could also be A or O.
No, two type O parents can only have type O children. See the table below from www.dna-bioscience.co.uk/did_you_know_abo.shtml If you look at the row for mother's blood type O where it intersects with the column for father's blood type O, you will see that the child's blood type must be O. For the child to be Rh+, only one of the parents has to be Rh+.
blood group "A" or "O".
No, unless they adopt.
Generally speaking, from what I've learned it Biology, is that more than likely, your children will have the same blood type, because O is a dominant trait. Now in order to get a better understanding of what blood type they would have, you need to know the blood types of your parents, and a little chart can be drawn, and it would basically tell you what blood type your children would have. But I'm pretty sure they will be type O.
they are O i think
If both parents are B- they can only have children who are B- and O-. One would have to be positive in order to have a child with positive blood.
No, two parents with type O blood cannot have a child with blood type A. Blood type O is recessive and a child can only have type A blood if they inherit an A allele from one parent and either an A or O allele from the other parent.