A) nonrandom mating.
B) geographic isolation.
C) genetic drift.
D) gene flow.
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Multiple Choice
A) 100
B) 400
C) 800
D) 1,000
E) 10,000
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A) 23%.
B) 46%.
C) 54%.
D) There is not enough information to say.
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Multiple Choice
A) genetic drift.
B) gene flow.
C) nonrandom mating.
D) directional selection.
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Multiple Choice
A) It is created by the direct action of natural selection.
B) It arises in response to changes in the environment.
C) It must be present in a population before natural selection can act upon the population.
D) It tends to be reduced by the processes involved when diploid organisms produce gametes.
E) A population that has a higher average heterozygosity has less genetic variation than one with a lower average heterozygosity.
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Multiple Choice
A) The proportions of both types of homozygote should decrease.
B) The proportion of the population that is heterozygous at this locus should remain constant.
C) The population's average heterozygosity should decrease.
D) The two homozygotes should decrease at different rates.
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Multiple Choice
A) 0.1 a, 0.9 A
B) 0.2 a, 0.8 A
C) 0.5 a, 0.5 A
D) 0.8 a, 0.2 A
E) 0.4 a, 0.6 A
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Multiple Choice
A) natural selection.
B) no genetic drift.
C) no random mating.
D) no evolution.
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A) alleles mutate in different geographical areas
B) alleles increase in frequency in original population
C) beneficial alleles are transferred to a new population
D) allele frequencies decrease in new population
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A) directional selection
B) disruptive selection
C) stabilizing selection
D) natural selection
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A) 1 only
B) 4 only
C) 2 and 3
D) 4 and 5
E) 1, 2, and 3
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A) an assessment of evolution at a particular locus
B) a determination of allele frequency
C) a determination of genotype frequency
D) an assessment of heterozygosity in a population
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Multiple Choice
A) pansexual selection.
B) stabilizing selection.
C) intrasexual selection.
D) intersexual selection.
E) artificial selection.
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Multiple Choice
A) must happen, due to organisms' innate desire to survive.
B) must happen whenever a population is not well adapted to its environment.
C) can happen whenever any of the conditions for Hardy-Weinberg equilibrium are not met.
D) requires the operation of natural selection.
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Multiple Choice
A) the allele's frequency should not change from one generation to the next, but its representation in homozygous and heterozygous genotypes may change.
B) natural selection, gene flow, and genetic drift are acting equally to change an allele's frequency.
C) this means that, at this locus, two alleles are present in equal proportions.
D) the population itself is not evolving, but individuals within the population may be evolving.
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A) population A
B) population B
C) population C
D) They are all the same.
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A) formation of new genetic variants
B) sorting by natural selection
C) increase in frequency of alleles that provide reproductive advantage
D) survival of the fittest
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Multiple Choice
A) stabilizing selection; disruptive selection
B) disruptive selection; stabilizing selection
C) disruptive selection; directional selection
D) directional selection; disruptive selection
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Multiple Choice
A) a selection of the best-suited traits for the environment
B) a series of chance events that change allele frequency
C) when a few individuals become isolated from a larger population, and their gene pool differs from that source population
D) a sudden change in the environment that reduces the size of the population
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Multiple Choice
A) stabilizing evolution.
B) sexual selection.
C) adaptive evolution.
D) directional selection.
Correct Answer
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