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Microevolution - Mechanisms Quiz 2

Quiz by Daniel Genesee

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12 questions
Show answers
  • Q1
    Which of the following statements describes what all members of a population share?
    They are members of the same species.
    They are temporally isolated from one another.
    They are geographically isolated from one another
    They are members of the same species.
  • Q2
    The combined genetic information of all members of a particular population is the population’s
    relative frequency
    gene cauldron
    gene pool
  • Q3
    Which statement about gene pools is typically true? [Hint: you might want to approach ths question by eliminating answers you know to be false]
    They contain two or more alleles for each gene.
    They contain only dominant alleles
    The relative frequencies of the alleles never change.
    They belong to two or more interbreeding species.
  • Q4
    If an allele makes up one fourth of a population’s alleles for a given trait, its relative frequency is
    25 percent
  • Q5
    A single-gene trait that has two alleles and that shows a simple dominant-recessive pattern will result in
    four phenotypes
    millions of phenotypes
    one phenotype
    two phenotypes
  • Q6
    The effects of genetic drift on evolutionary change or most pronounced in populations that
    are formed from new species
    are small
    are very large
    have unchanging frequencies
  • Q7
    The type of genetic drift that follows the colonization of a new habitat by a small group of individuals is called
    the founder effect
    stabilizing selection
    hardy-weinberg principle
    directional selection
  • Q8
    The genetic equilibrium of a population can be disturbed by each of the following EXCEPT
    a large population size
    non-random mating
    organisms moving into and out of the population
  • Q9
    The allele frequencies of a population are more likely to remain unchanged if
    the mutation rate increases
    the population size is reduced
    all mating is random
    there is frequent movement of organisms into and out of the population.
  • Q10
    What situation might develop in a population having some plants whose flowers open at midday and other plants whose flowers open late in the day?
    genetic drift
    behavioral isolation
    temporal isolation
    geographic isolation
  • Q11
    The situation in which allele frequencies of a population remain constant is called
    natural selection
    genetic equilibrium
    genetic stability
  • Q12
    The distribution of phenotypes for a typical polygenic trait can often be expressed as
    mendelian ratios
    a bell-shaped curve
    a bar graph
    allele frequencies

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