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Which of the following is a possible genotype for the mother?

kevingurley

wrote...

Posts: 1

Rep:

10 years ago

Which of the following is a possible genotype for the mother?

A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N

Source Campbell Biology 9th Edition

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Laser_3

wrote...

#1

10 years ago

Hi kevingurley,

Since O is recessive, the mother blood genotype has to be OA. The Rh is heterozygous, because she is positive and the son is Rh negative

Best,
Laser

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