Mechanisms of Evolution

Natural selection is

• "survival of the fittest"

• descent with modification

• Gregor Mendel's main idea.

• one mechanism of evolution

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Darwin noticed that populations demonstrate

• variation

• overproduction of offspring

• artificial selection

• heritability

• mutations

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Type of natural selection that eliminates extremes of a traits and keep the "norm".

• Artificial selection

• Stabilizing selection

• Directional selection

• Diversifying/Disruptive selection

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Type of natural selection that favors one extreme OR the other.

• Artificial selection

• Stabilizing selection

• Directional selection

• Diversifying/Disruptive selection

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Type of natural selection that favors BOTH extremes.

• Artificial selection

• Stabilizing selection

• Directional selection

• Diversifying/Disruptive selection

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Type of natural selection shown in this diagram.

• Artificial selection

• Stabilizing selection

• Directional selection

• Diversifying/Disruptive selection

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Type of natural selection shown in this diagram.

• Artificial selection

• Stabilizing selection

• Directional selection

• Diversifying/Disruptive selection

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Type of natural selection shown in this diagram.

• Artificial selection

• Stabilizing selection

• Directional selection

• Diversifying/Disruptive selection

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A change in the gene pool of a small population due to chance.

• Gene flow

• Genetic drift

• Non-Random mating

• Artificial Selection

• Mutation

Type of genetic drift that occurs by chance when a small group settles in a location separated from the rest of the group.

• Founder Effect

• Bottleneck Effect

• Immigration

• Emigration