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If a person has type ab blood, both his parents must have ________.
a. type o blood
b. type ab blood
c. type a blood
d. none of the choices are correct.

Respuesta :

the answer is: D. None of the choices are correct

In order to have type ab blood, you need to have genotype blood type A and genotype blood type B.
You could receive it from these scenarios:
- Both of your parents are type ab blood
or
- One of your parents has type a blood while the other has type b blood

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