If one parent has a blood type of B-positive and the other has A-positive can their child have B-negative?

Answer 1

No. A person's blood type is made of up contributions from both your mother and your father. O blood types (whether positive or negative) are really OO. So no matter whether you get the first O or the second O, all resulting children must be OO. For example, my mother is an OO, and my supposed father was an AO. I am a type B, so there is no way that I am that man's child (my mother just recently confirmed that there could have been someone else). Blood types resulting from my mother and "father" could be A (AO), or O (OO), but that is it. O is a recessionary gene, that is why a person with type O blood can only contribute O's to their children. In order to be type O, you must be an OO.

Answer 2

Yes - this is quite possible. With Rh factors, the positive is the dominant allele. If both parents are heterozygous, Rh+Rh-, then they can have an Rh- child. The parent with blood type B also has to be heterozygous for this, BO.

Answer 3

Yes.

To put it simply, both the B and A blood types can be BO and AO from an inheritance standpoint, meaning a child could be O. The same for the rh portion of the question, a child with one rh positive parent and one rh negative patient could be rh negative.

Answer 4

Yes. Both parents would have to be heterozygous for blood group, AO and BO, so that each parent can pass an O allele to their offspring. The B positive parent would have to be heterozygous for rh factor, rh+ rh-, and would have passed the rh- allele to the offspring, so that the child's genotype will be OO/rh- rh- , and its phenotype is O negative.

Answer 5

Yes, it is possible for the child to have blood type B-negative. The child would inherit one B and one O allele from the B-positive parent and one A and one O allele from the A-positive parent, resulting in blood type B-negative.

Answer 6

Yes.

Answer 7

no

Answer 8

no