Evolution of Populations Review

Genetic variation can arise from a random change in the DNA of a gene. The change is called a(n)

• mutation

• gene flow

• gene pool

• allele

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Which of the following describes natural selection?

• it acts on genetic material directly
• it acts on existing physical traits
• it forms new traits 
• it forms new genetic material

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When individuals choose traits possessed by the opposite sex it is called…

• Mutation
• Gene Flow
• Genetic Drift
• Sexual Selection

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The type of genetic drift that follows the colonization of a new habitat by a small group of individuals is called

• the Hardy-Weinberg principle
• the founder effect
• directional selection
• the bottleneck effect

There was once a large population of cheetah, but about 12,000 years ago most of the cheetahs were killed off because of human activity and only a few survived.  What is this an example of?

• Bottleneck Effect
• Genetic Drift
• Founder Effect
• Natural Selection

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If a population is made of 10 homozygous dominant and 5 heterozygous individuals; How many dominant alleles are present?

• 10

• 15

• 20

• 25

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Evolution can be defined as a ____________

• change in the frequency of an allele in a population over time

• change in the frequency of reproduction in a population

• change in the frequency of an allele in an individual

• change in the frequency of a gene pool in an allele

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Genetic drift is change in the allele frequency of a population due to...

• random chance
• natural selection
• non-random mating (sexual selection)
• artificial selection

This mechanism of evolution occurs when individuals migrate between populations.

• Extinction

• Gene flow

• Genetic drift

• Natural Selection

What type of genetic drift is most common after a natural disaster which results in a drastic reduction in population size?

• Bottleneck Effect

• Founders Effect

• Gene Flow

• Sexual Selection

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