Exploring Genetic Variation
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Questions and Answers

Which type of mutations are typically harmful?

  • Mutations that disrupt many loci
  • Mutations that rearrange many loci
  • Mutations that duplicate many loci
  • Mutations that delete many loci (correct)
  • What happens when duplicated genes are not harmful?

  • They are eliminated through natural selection
  • They remain unchanged and serve their original function
  • They become harmful and cause genetic disorders
  • They accumulate mutations and take on new functions (correct)
  • What is the role of gene duplications in evolution?

  • They have no role in evolution
  • They only occur in certain organisms
  • They play a minor role in evolution
  • They play a major role in evolution (correct)
  • What is the average mutation rate in animals and plants?

    <p>One in every 100,000 genes per generation</p> Signup and view all the answers

    Why do prokaryotes have faster accumulation of genetic variation?

    <p>They have shorter generation times</p> Signup and view all the answers

    Why do viruses have faster mutation rates?

    <p>Their RNA genome cannot be repaired by host cells</p> Signup and view all the answers

    What is the main source of genetic variation in organisms that reproduce sexually?

    <p>Recombination of alleles</p> Signup and view all the answers

    Which mechanism of sexual reproduction shuffles existing alleles into new combinations?

    <p>Crossing over</p> Signup and view all the answers

    What is the role of independent assortment in sexual reproduction?

    <p>It ensures random fertilization</p> Signup and view all the answers

    What is the role of random fertilization in sexual reproduction?

    <p>It shuffles existing alleles into new combinations</p> Signup and view all the answers

    Which process can result in the formation of new alleles?

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

    What is the main source of genetic variation in sexual reproduction?

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

    Which type of mutation often results in neutral variation?

    <p>Mutation in noncoding regions</p> Signup and view all the answers

    What can rare mutant alleles potentially improve in organisms?

    <p>Reproductive success</p> Signup and view all the answers

    Which process can lead to the creation of new genes?

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

    What is the result of genetic variation through mutation?

    <p>New alleles and genes</p> Signup and view all the answers

    Which process can create genetic variation in asexual organisms?

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

    What is the role of gene duplication in the formation of new alleles?

    <p>To create additional copies of a gene</p> Signup and view all the answers

    What is the result of neutral variation in noncoding regions of DNA?

    <p>No selective advantage or disadvantage</p> Signup and view all the answers

    Which process can create new alleles in organisms?

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

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