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The Ability to Roll the Tongue Is Caused by a Dominant

Question 57

Multiple Choice

The ability to roll the tongue is caused by a dominant allele. A woman is a "roller," but one of her parents is not. What is the woman's genotype?


A) homozygous dominant
B) heterozygous
C) homozygous recessive
D) either homozygous recessive or homozygous dominant
E) It cannot be determined from this information.

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