Hardy-Weinberg practice

  • Hardy-Weinberg tutorial (allele frequencies):


  • If 98 out of 200 individuals in a population express the recessive phenotype, what percent of the population are homozygous dominant? 49% 70% 30% 42% 9% X Solution:

  • If 98 out of 200 individuals in a population express the recessive phenotype, what percent of the population are heterozygotes? 49% 70% 30% 42% X 9% Solution:


    Brown hair (B) is dominant to blond hair (b). If there are 168 brown hairs in a population of 200:

  • What is the predicted frequency of heterozygotes? 16% 40% 60% 48% X 84% Solution:

  • What is the predicted frequency of homozygous dominant? 16% 40% 60% 48% 36% X Solution:

  • What is the predicted frequency of homozygous recessive? 16% X 40% 60% 48% 36% Solution:


    If blonds occur in 36% of the population:

  • What is the allele frequency for b? 36% 60% X 40% 16% 48% Solution:

  • What is the allele frequency for B? 36% 60% 40% X 16% 48% Solution:

  • What is the predicted frequency of heterozygotes? 36% 60% 40% 16% 48% X Solution:

  • What is the predicted frequency of homozygous dominant? 36% 60% 40% 16% X 48% Solution:
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