Evolutionary Processes: Non-Random Mating and Assortative Mating
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Questions and Answers

What is the primary consequence of non-random mating on the population's genotype frequency?

  • Decreased homozygosity
  • No effect on genotype frequency
  • Increased homozygosity (correct)
  • Increased heterozygosity
  • What type of assortative mating leads to an increase in heterozygote frequency?

  • Negative assortative mating (correct)
  • Non-assortative mating
  • Random assortative mating
  • Positive assortative mating
  • What is the primary effect of inbreeding on the population's genotype?

  • No effect on genetic variation
  • Increased genetic variation
  • Decreased genetic variation (correct)
  • Increased gene flow
  • What is the term for the measurable, gradual change in a phenotypic trait over a geographic region?

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

    What is the primary consequence of inbreeding depression on the population's fitness?

    <p>Decreased overall fitness</p> Signup and view all the answers

    What is the primary reason for the increased phenotypic variation in populations with a wider geographic range?

    <p>Greater environmental variation</p> Signup and view all the answers

    What is the result of the union of unreduced gametes in polyploidy?

    <p>The offspring will be a tetraploid and reproductively isolated from the parent</p> Signup and view all the answers

    Why can sterile plant hybrids still reproduce?

    <p>Through apomixis, producing viable seeds without meiosis or sexual recombination</p> Signup and view all the answers

    What is the term for the multiplication of chromosome number that allows hybrid offspring to be fertile but isolates them from their parents?

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

    What is the term for the process of speciation resulting from the union of unreduced gametes?

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

    What is the reproductive status of the offspring resulting from the union of unreduced gametes?

    <p>Reproductively isolated from both parents</p> Signup and view all the answers

    What is the ploidy level of the wheat species that arose naturally as an allopolyploid?

    <p>Hexaploid (6n)</p> Signup and view all the answers

    What is the genetic makeup of the bear shot in 2010 by an Inuit hunter?

    <p>A second generation offspring of a hybrid mother and a grizzly father</p> Signup and view all the answers

    What is the main concern raised by the range extension of mallards in Atlantic Canada?

    <p>The ability of mallards to hybridize with other ducks, leading to loss of genetic diversity</p> Signup and view all the answers

    What is the phenomenon where species ranges overlap and expand, leading to increased hybridization?

    <p>Climate change</p> Signup and view all the answers

    What is the outcome of hybridization in terms of species formation?

    <p>It blurs the lines between existing species</p> Signup and view all the answers

    What can be inferred about the black duck population in Cape Breton?

    <p>It is stable despite the prevalence of hybridization</p> Signup and view all the answers

    What is the term for the breeding of individuals with similar characteristics or traits?

    <p>Assortative mating</p> Signup and view all the answers

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