Genetic Variation in Biology
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Questions and Answers

What type of mutation results in an alteration in the reading frame of DNA?

  • Frameshift mutation (correct)
  • Substitution mutation
  • Insertion mutation
  • Deletion mutation
  • Which process plays a major role in the genetic variability of sexually reproducing organisms by exchanging genetic information between chromosomes?

  • Mutation
  • Selective breeding
  • Genetic recombination (correct)
  • Gene flow
  • What type of genetic variation involves discrete traits with an either/or outcome, like flower color in pea plants?

  • Polygenic traits
  • Continuous traits
  • Substitution mutations (correct)
  • Mutation tracking
  • Which is a source of genetic variation that can be passed on to offspring and provides the basis for changes in generations of organisms?

    <p>Germline mutations</p> Signup and view all the answers

    What type of genetic variation is characterized by appearing on a continuum and being influenced by multiple genes or environmental factors?

    <p>Continuous traits</p> Signup and view all the answers

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

    <p>Inheritance of alleles from parents</p> Signup and view all the answers

    Which of the following is NOT an example of genetic variation?

    <p>Seasonal changes in fur color</p> Signup and view all the answers

    What is the significance of genetic variation in the context of natural selection?

    <p>It provides the raw material for natural selection to act upon</p> Signup and view all the answers

    Which of the following best describes gene frequency?

    <p>The proportion of a particular gene variant in a population</p> Signup and view all the answers

    Based on the information provided, what can be inferred about the fungus that causes white-nose syndrome (WNS) in bats?

    <p>The fungus is present in European bat populations but does not cause mortality</p> Signup and view all the answers

    What is gene flow and why is it important for genetic variation?

    <p>The movement of genes between populations, leading to the amplification of gene variants and the emergence of new traits.</p> Signup and view all the answers

    What effect is observed when a small group of organisms leaves a larger population and colonizes a new area with reduced genetic variation?

    <p>Founder effect</p> Signup and view all the answers

    How do homologous chromosomes contribute to genetic variation?

    <p>By exchanging genetic material through crossing over during meiosis.</p> Signup and view all the answers

    What role does sexual reproduction play in generating genetic variation?

    <p>Allowing for more and different combinations of alleles through independent assortment and crossing over.</p> Signup and view all the answers

    What consequences can a bottleneck effect have on a population's genetic variation?

    <p>Reducing the population size and diversity, resulting in less adaptive potential.</p> Signup and view all the answers

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