Blood type in humans is an example of a trait that has multiple alleles. the alleles for type a blood and type b blood are codominant, and type o blood is recessive to both type a and type b. if a girl with type ab blood has a brother with type o blood and a sister with type b blood, which of the following genotypes could it be possible for their parents to have?
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Blood type in humans is an example of a trait that has multiple alleles. the alleles for type a bloo...
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