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Evolution Review. Is "brown hair" a genotype or a phenotype?. Does natural selection work directly on genotype or phenotype?. Name two sources of genetic variation. True or False: Height in humans is an example of a polygenic trait.

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  • What is the bottleneck effect? allele may leave more descendants than other individuals leave, just by chance. Over time, a series of chance occurrences can cause an allele to become more or less common in a population. What is this phenomenon called?


  • Name one example of the founder effect. allele may leave more descendants than other individuals leave, just by chance. Over time, a series of chance occurrences can cause an allele to become more or less common in a population. What is this phenomenon called?






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