Substrate Record: qid 3023

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qid 3023 · biology

Question: The ability to roll the tongue is conferred by a dominant gene, while its recessive allele fails to confer this ability. If 16 percent of the students in a school cannot roll their tongues, what percentage of students are heterozygous?

1. 36 percent
2. 32 percent
3. 24 percent
4. 40 percent
5. 20 percent
6. 48 percent
7. 68 percent
8. 16 percent
9. 64 percent
10. 52 percent

Our answer: F. 48 percent Source quote machine-checked (exact quote)

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