I assume the question is "Is it possible for two parents with type B blood to have a child with type O blood?"
Yes they can, if both parents have BO genotype. The chance of the child having O blood is 25% in this case.
Source: http://en.wikipedia.org/wiki/Blood_type
No, if both parents have O blood type, they could not have a child with A or B blood type. O blood type is recessive, so neither parent could be carrying the dominant traits for A or B blood types and still have O blood type.
Yes, they can have a child with blood type AB, which is the rarest of the four types.
it is possible but the child can be a positive
Generally no but in very rare circumstances, through mutations and incorrectly copying DNA, it is possible for two parents with type O blood to have a child with AB blood.
They cannot. Two parents with type O negative blood will produce offspring of type O negative.
No. It is not possible for a child to have A if the parents are O blood type. If both parents have type O blood, then their children will also have type O blood. However, two parents with type A or type B blood (both the same or one of each) can sometimes have a child with type O blood. That is because the gene for type O blood is recessive. But they must carry the O type. However, two parents with type AB blood can have a child with type A, type B, or type AB blood, but cannot have a child with type O blood.
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+.
For parents with o+o, they will have kids with O type blood. For parents with A+A, they will have kids with A or O type blood. For parents with B+B, they will have kids with B or O type blood. Foe parents with AB+AB, they will have kids with AB, A or B type blood.
yes they can
No way...
There are no limitations on compatibility of parents based on blood type. Two O positive parents may have a child without any special concerns.
No, unless they adopt.
most probably not.