[IB Biology SL at GHS: Genetics Reviews]

14. Which of the following statements is/are not true of the alleles that detemine human blood type.

A) A is dominant to O.

B) B is dominant to O

C) A and B are codominant.

D) A is dominant to B.

E) O is dominant to both A and B.

F) Both Answers D & E are false.

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Slichter