Understanding Genetic Variation
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Questions and Answers

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

  • Evolution
  • Genetic mutations (correct)
  • Mating patterns
  • Environmental factors

    • Which of the following is NOT a factor that contributes to genetic variation?

  • Crossing over during meiosis
  • Genetic drift
  • Selective breeding (correct)
  • Migration of individuals

    • How do mating patterns affect genetic variation?

  • Inbreeding increases variation, while outbreeding decreases it
  • Both inbreeding and outbreeding increase variation
  • Outbreeding increases variation, while inbreeding decreases it (correct)
  • Mating patterns have no effect on genetic variation

    • Which of the following is an example of phenotypic variation?

    <p>Skin color</p> Signup and view all the answers

    How does the distribution of individuals within a species affect genetic variation?

    <p>Widely distributed individuals can either increase or decrease genetic variation, depending on other factors</p> Signup and view all the answers

    Which of the following is an example of genetic variation?

    <p>Blood type</p> Signup and view all the answers

    What is the primary effect of genetic drift on genetic variation?

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

    Which of the following is NOT a cause of genetic variation within a species?

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

    How do migrating individuals affect the genetic makeup of a population?

    <p>They introduce new genetic variants into the population.</p> Signup and view all the answers

    Which of the following is an example of genotypic variation?

    <p>Blood type</p> Signup and view all the answers

    How does crossing over during meiosis contribute to genetic variation?

    <p>It shuffles the genetic material between homologous chromosomes.</p> Signup and view all the answers

    What is the primary effect of genetic drift on genetic variation?

    <p>It decreases genetic variation within a population.</p> Signup and view all the answers

    Which of the following is an example of both genetic and environmental variation?

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

    Which type of genetic variation is responsible for differences in observable traits, such as appearance and behavior?

    <p>Phenotypic variation</p> Signup and view all the answers

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