Mechanisms of Evolution and Microevolution
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Questions and Answers

What is the focus of the study of evolutionary processes?

  • The genetics of extinct species
  • Changes that occur within populations (correct)
  • Changes that occur within individual organisms
  • The evolution of ecosystems
  • What is the source of genetic variation in a population?

  • Genetic drift
  • Mutations (correct)
  • Gene flow
  • Non-random mating
  • What is the term for the change in percentages of alleles within a population?

  • Microevolution (correct)
  • Genetic drift
  • Macroevolution
  • Natural selection
  • Which of the following processes is most significant in the formation of new species?

    <p>Natural selection</p> Signup and view all the answers

    What is the result of genetic variation in a population?

    <p>An increase in the population's genetic diversity</p> Signup and view all the answers

    What is the term for the movement of alleles from one population to another as a result of migration?

    <p>Gene flow</p> Signup and view all the answers

    What is the effect of gene flow on the allele frequencies in a population?

    <p>It may change the allele frequencies and increase genetic diversity</p> Signup and view all the answers

    Why does non-random mating lead to less variation in a population?

    <p>Because it leads to a higher proportion of homozygous individuals</p> Signup and view all the answers

    What is the effect of inbreeding on the expression of alleles in a population?

    <p>It increases the expression of harmful recessive alleles</p> Signup and view all the answers

    What is the advantage of self-fertilization in pea plants?

    <p>It occurs if the plant is not able to reproduce sexually</p> Signup and view all the answers

    What is the result of male caribou sparring with each other?

    <p>They increase their chances of mating</p> Signup and view all the answers

    What does gene flow involve?

    <p>The movement of genes between populations</p> Signup and view all the answers

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