Non-random Mating and Reproductive Isolation Quiz
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Questions and Answers

What is the major factor that may limit gene flow between apple maggot fly species that use different hosts but share many alleles?

  • Genetic mutations
  • Subtle habitat differences (correct)
  • Temporal differences
  • Reproductive isolation
  • Which concept defines rapidly diverging species based on phylogenetic criteria?

  • Hybridization concept
  • Biological species concept
  • Gene flow concept
  • Phylogenetic species concept (correct)
  • According to Ernst Mayr's Biological species concept, what defines a species?

  • Habitat overlap
  • Gene flow
  • Temporal isolation
  • Reproductive isolation (correct)
  • In the context of incipient species divergence, what causes sympatric speciation?

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

    What type of reproductive isolation mechanism is pollinator preference an example of?

    <p>Pre-zygotic barrier to hybridization</p> Signup and view all the answers

    Threats to species diversity can arise from which of the following?

    <p>Habitat homogeneity</p> Signup and view all the answers

    What recent phenomenon has been observed in Cichlid fish populations in polluted lakes?

    <p>Enhanced gene flow</p> Signup and view all the answers

    What does the text suggest as a post-zygotic barrier to hybridization in terms of African cichlid fish?

    <p>Hybrids with lower fitness</p> Signup and view all the answers

    What is a characteristic of allopatric speciation?

    <p>Depends on physical barriers to gene flow</p> Signup and view all the answers

    In the context of African cichlid fish, what was a factor contributing to initial divergence among incipient species?

    <p>Mating preferences based on visual cues</p> Signup and view all the answers

    Which of the following is NOT mentioned as a barrier to hybridization in the context of Hawaiian honeycreepers?

    <p>Cloudy water</p> Signup and view all the answers

    How did sympatric speciation occur in African cichlid fish according to the text?

    <p>By rapid divergence from hybridization events</p> Signup and view all the answers

    What is a significant threat to species diversity in California Mimulus (monkeyflowers) according to the text?

    <p>Cloudy water diminishing visual cues to mating preferences</p> Signup and view all the answers

    Which process involves physical or external barriers to gene flow?

    <p>Allopatric divergence</p> Signup and view all the answers

    In the context of genetic divergence, what does clinal variation refer to?

    <p>Variation based on geographic location</p> Signup and view all the answers

    What type of mating may counter intermating between individuals with distinct phenotypes?

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

    What is a key factor that influences the adaptive process according to Antonovics and Bradshaw (1970)?

    <p>Heritable variation of Zinc tolerance</p> Signup and view all the answers

    How does assortative mating affect subpopulations?

    <p>It may lead to divergence by mating between like phenotypes</p> Signup and view all the answers

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