Credit Sprint / Practice problems / Hardy-Weinberg heterozygote frequency

Hardy-Weinberg heterozygote frequency practice problems

Biology Unit 7. Try each one, then open the worked solution. The Credit Sprint app generates unlimited new versions with fresh numbers.

Problem 1.

If the recessive allele frequency is q = 0.1, what percentage of the population is heterozygous?

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p = 1 − 0.1 = 0.9; 2pq = 2 × 0.9 × 0.1 = 0.18 = 18%.

Problem 2.

If the recessive allele frequency is q = 0.4, what percentage of the population is heterozygous?

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p = 1 − 0.4 = 0.6; 2pq = 2 × 0.6 × 0.4 = 0.48 = 48%.

Problem 3.

If the recessive allele frequency is q = 0.2, what percentage of the population is heterozygous?

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p = 1 − 0.2 = 0.8; 2pq = 2 × 0.8 × 0.2 = 0.32 = 32%.

Problem 4.

If the recessive allele frequency is q = 0.3, what percentage of the population is heterozygous?

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p = 1 − 0.3 = 0.7; 2pq = 2 × 0.7 × 0.3 = 0.42 = 42%.

Problem 5.

If the recessive allele frequency is q = 0.2, what percentage of the population is heterozygous?

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p = 1 − 0.2 = 0.8; 2pq = 2 × 0.8 × 0.2 = 0.32 = 32%.

Problem 6.

If the recessive allele frequency is q = 0.5, what percentage of the population is heterozygous?

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p = 1 − 0.5 = 0.5; 2pq = 2 × 0.5 × 0.5 = 0.5 = 50%.