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as part of 91157

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Term
Definition
Allele frequency   show
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show A population is suddenly reduced due to a catastrophic event to a few individuals and then recovers with low genetic diversity.  
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Founder effect   show
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Genetic variation   show
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show The change in allele frequencies in populations due to chance events (not selection). It may include the loss of alleles from a gene pool. The effects are greatest in small populations.  
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Natural selection   show
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show Anything that affects the survival and reproductive success of an individual  
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artificial selection   show
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Disruptive selection   show
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show Occurs in a population when intermediate and phenotypes at one extreme have higher fitness than phenotype at the other extreme.  
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show Occurs in a population when intermediate phenotypes have higher fitness than phenotypes at the either extreme.  
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show Individuals coming into the gene pool. Increases allele frequency and can introduce new alleles.  
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show Individuals leaving the gene pool. decreases allele frequency and can reduce genetic diversity.  
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Created by: NZARoberts
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