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Can a O negative and a AB positive have a B- child?

2006-09-24 17:39:51 · 4 answers · asked by melinda 2 in Science & Mathematics Other - Science

4 answers

Yes. In fact, it'll happen 25% of the time.

OO-- x AB+- means that the gametes can only be:

O- and one of A+, A-, B+ or B-

therefore the child can only be:

AO+-, AO--, BO+- or BO--

which yields:

A+, A-, B+ or B-

2006-09-24 17:42:10 · answer #1 · answered by Anonymous · 1 0

Yes they can. In fact the children of these two people will either be blood type A or B and can be either Rh negative or Rh positive.

The O person has no surface markers of the ABO group and the AB person has one copy of A and one copy of the B allele. So the results look like this:

A::B X O::O = A::O which will be type A
and B::O which will be type B.

The Rh factor frequency will depend on whether the person who is Rh positive is homozygous or heterozygous for Rh.

2006-09-25 01:30:48 · answer #2 · answered by Gene Guy 5 · 0 0

yes- the
Oneg is genotype OO neg neg
To have a B- child the
AB pos genotype is AB pos neg
The childs genotype is BO neg neg

2006-09-24 21:25:34 · answer #3 · answered by Intersect 4 · 0 0

Blood type OO neg. and AB pos.

Possibilities:
AO = A type. (with recess pos. or neg.).
BO = B type. (with recess pos. or neg.).
Yes, it could be a B type child.

2006-09-24 17:42:10 · answer #4 · answered by Brenmore 5 · 0 2

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