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Principals of Evolution

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Across
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Darwin's proposed mechanism for evolution
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Genetic drift that occurs after a small number of individuals colonize a new area
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When closely related species evolve and become increasingly different
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Isolation that occurs because of differences in mating behaviors
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The process of one species becoming two or more separate species
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A trait that allows an organism to better survive in its environment
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A measure of your reproductive success.
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Occurs when a physical barrier divides a population
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Isolation that occurs when timing prevents reproduction between populations
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Change in allele frequency due to chance; causes a loss of genetic diversity
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When certain traits increase mating success
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Permanent change in DNA
Down
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Genetic drift that occurs after an event greatly reduces the size of a population
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Wrote "Origin of Species"
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The change in a populations genetic makeup through successive generations
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When two or more species evolve in response to changes in each other
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Left over organs or structures that had a function in an early ancestor
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Speciation by geographic isolation
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The movement of alleles from one population to another; mechanism for evolution