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Hardy–Weinberg equilibrium

Biology • Population Genetics • Knowledge-Based • 5 questions

Hardy–Weinberg equilibrium Knowledge-Based Download PDF

Biology · Evolution · Biology · Population Genetics

5 Biology practice questions on Hardy–Weinberg equilibrium. Questions that assess core concepts and understanding.

Questions

  1. 1.

    In a diploid population in Hardy–Weinberg equilibrium, the frequency of the dominant allele for a specific trait is 0.6. What is the expected frequency of individuals in this population that exhibit the dominant phenotype?

    • A) 0.36
    • B) 0.84
    • C) 0.48
    • D) 0.60
  2. 2.

    In a sexually reproducing diploid population governed by two alleles at an autosomal locus, what is the maximum theoretical frequency that heterozygous individuals can achieve under Hardy–Weinberg equilibrium?

    • A) 0.50
    • B) 0.25
    • C) 0.75
    • D) 1.00
  3. 3.

    Which of the following statements correctly describes the behavior of allele frequencies across successive generations in a population that fulfills all assumptions of the Hardy–Weinberg principle?

    • A) Dominant alleles progressively increase in frequency until they achieve fixation within the gene pool.
    • B) Recessive alleles gradually decline in frequency because their phenotypic expression is masked in heterozygotes.
    • C) Genotype ratios fluctuate randomly each generation even when no evolutionary mechanisms are operating.
    • D) Allele frequencies remain constant from generation to generation in the absence of evolutionary influences.
  4. 4.

    Which of the following conditions is necessary for a sexually reproducing population to maintain Hardy–Weinberg equilibrium for a specific gene locus?

    • A) Non-random mate choice based on phenotypic preferences
    • B) High mutation rates that continuously generate novel alleles
    • C) Net directional migration of individuals between distinct populations
    • D) An infinitely large population size that prevents genetic drift
  5. 5.

    In a large, randomly mating diploid population that is in Hardy–Weinberg equilibrium, the frequency of individuals expressing a recessive phenotype for a certain gene is 0.09. What is the expected frequency of heterozygous individuals in this population?

    • A) 0.42
    • B) 0.21
    • C) 0.49
    • D) 0.70