Molecular Evolution and Population Genetics Quiz
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Questions and Answers

What is the primary source of genetic variation in populations according to the passage?

  • Mutation (correct)
  • Migration
  • Recombination
  • Random genetic drift

    • How does the passage describe the effect of selection on the frequency of a favored dominant allele?

  • The frequency is not affected by selection
  • The frequency changes slowly if the allele is rare
  • The frequency changes rapidly
  • The frequency changes slowly if the allele is common (correct)

    • What is the main consequence of heterozygote superiority according to the passage?

  • The favored allele is maintained at high frequencies in the population (correct)
  • The favored allele is quickly eliminated from the population
  • The favored allele has no effect on the fitness of the organism
  • The favored allele is only expressed in heterozygous individuals

    • How does the passage describe the effect of migration on allele frequencies in a population?

    <p>Migration causes allele frequencies to be the weighted average of the two populations (C)</p> Signup and view all the answers

    According to the passage, what is the primary factor that prevents the elimination of harmful mutations from a population?

    <p>Mutation (C)</p> Signup and view all the answers

    Which of the following is NOT mentioned in the passage as a key process in population genetics?

    <p>Genetic engineering (D)</p> Signup and view all the answers

    Which of the following is a key ancestral process that shapes genetic variation?

    <p>All of the above (D)</p> Signup and view all the answers

    What is the effect of genetic drift on allele frequencies over generations?

    <p>It decreases diversity by making individuals more genetically similar (D)</p> Signup and view all the answers

    How does genetic drift affect linkage disequilibrium (LD) between alleles?

    <p>It increases LD by creating correlations between alleles (C)</p> Signup and view all the answers

    What is the effect of genetic drift on heterozygosity in a population?

    <p>It decreases heterozygosity by reducing the frequency of heterozygotes (B)</p> Signup and view all the answers

    How does population size affect the rate of genetic drift?

    <p>Drift acts faster in smaller populations (D)</p> Signup and view all the answers

    Which of the following statements about genetic drift is true?

    <p>It is the only process that can lead to the fixation or loss of alleles (D)</p> Signup and view all the answers

    Which of the following is NOT one of the conditions required for the Hardy-Weinberg principle to hold true?

    <p>Genetic drift is occurring in the population (D)</p> Signup and view all the answers

    Huntington's disease is an example of which type of genetic disorder?

    <p>Single-locus disorder (B)</p> Signup and view all the answers

    What is the primary cause of genetic variation within a population?

    <p>Mutation (A)</p> Signup and view all the answers

    In the Hardy-Weinberg principle, what does the letter 'p' represent?

    <p>The frequency of the dominant allele (D)</p> Signup and view all the answers

    Which of the following is NOT a consequence of violating the Hardy-Weinberg assumptions?

    <p>The population size will decrease (B)</p> Signup and view all the answers

    What is the term used to describe the mating of individuals that are more closely related than expected by chance?

    <p>Inbreeding (C)</p> Signup and view all the answers

    In a population with two alleles, A and a, what is the frequency of heterozygous individuals (Aa) if the frequency of the dominant allele (A) is 0.6?

    <p>0.48 (C)</p> Signup and view all the answers

    Which of the following population genetic models assumes that populations are infinitely large and that migration, mutation, and selection do not occur?

    <p>Hardy-Weinberg model (D)</p> Signup and view all the answers

    What is the process by which new genetic combinations are generated through the exchange of genetic material between homologous chromosomes during meiosis?

    <p>Recombination (A)</p> Signup and view all the answers

    Which of the following is NOT a force that can cause changes in allele frequencies within a population?

    <p>Meiosis (C)</p> Signup and view all the answers

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