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The genotypes of a husband and wife are ...

The genotypes of a husband and wife are `I^AI^B` and `I^AI^O`. Among the blood types of children, how many different genotypes and phenotypes are possible?

A

2 genotypes and 3 phenotypes

B

4 genotypes and 3 phenotypes

C

4 genotypes and 4 phenotypes

D

3 genotypes and 3 phenotypes

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