Hardy-Weinberg Equilibrium

AP Biology· difficulty 2/5

Phenotype Frequency Tongue roller 0.84 Non-roller 0.16 Rolling is dominant; HW assumed

What is p, the frequency of the dominant rolling allele R?

  • A

    0.16

  • B

    0.6

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  • C

    0.84

  • D

    0.4

Explanation

Non-roller is recessive: q² = 0.16, so q = 0.4. Therefore p = 1 - q = 0.6.

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