Mechanisms of Population Evolution
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Questions and Answers

Which mechanism causes allele frequency change by adaptation to the environment?

  • Genetic drift
  • Environment-driven mutation
  • Natural selection (correct)
  • Gene flow
  • In response to seed shortage on Daphne Major, which type of birds survived at a higher rate due to their ability to eat more plentiful large seeds?

  • Long-tailed birds
  • Larger-beaked birds (correct)
  • Medium-beaked birds
  • Smaller-beaked birds
  • What did Gregor Mendel's work on pea plants provide evidence of?

  • Hybridization without genetic variation
  • Environmental adaptation
  • Discrete heritable units (genes) (correct)
  • Continuous heritable units (genes)
  • Which scale of evolution refers to the change in allele frequencies in a population over generations?

    <p>Microevolution</p> Signup and view all the answers

    Which mechanism causes allele frequency change through chance events altering allele frequencies?

    <p>Genetic drift</p> Signup and view all the answers

    What level of population evolves in response to various mechanisms like natural selection, genetic drift, and gene flow?

    <p>Population, not individual members</p> Signup and view all the answers

    Which of the following is a result of genetic variation?

    <p>Neutral variation within genes</p> Signup and view all the answers

    What is the main source of genetic variation?

    <p>Change in the nucleotide sequence of DNA</p> Signup and view all the answers

    What type of mutation can have significant impact on phenotype?

    <p>Point mutation, change in a single nucleotide</p> Signup and view all the answers

    What can produce genetic variation in organisms with short generation times?

    <p>Mutation of genes</p> Signup and view all the answers

    Which statement about phenotypic variation is true?

    <p>Phenotypic variation can result from both environmental influences and genetic differences</p> Signup and view all the answers

    How is genetic variation quantified at the gene level?

    <p>By the percentage of heterozygous loci in a population</p> Signup and view all the answers

    Which process can produce new alleles?

    <p>Mutation of genes</p> Signup and view all the answers

    What can maintain a pool of alleles that could be beneficial if the environment changes?

    <p>&quot;Heterozygote protection&quot;</p> Signup and view all the answers

    How are phenotypic differences determined by two or more genes usually classified?

    <p>As variations in gradations along a continuum</p> Signup and view all the answers

    What type of mutation can have selective advantage or disadvantage?

    <p>Mutations that result in a change in phenotype</p> Signup and view all the answers

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