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13 Cards in this Set
- Front
- Back
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Darwin's Theory of evolution by natural selection
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differential survival and reproduction among individuals of a population that show variation in details of their shared traits(alleles)
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phenotypic variation
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individuals exhibit different traits (genetically based but expressed)
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population
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group of individuals of the same species in the same area at the time
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selection
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sorting process in a population
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variation
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variation is the raw material for evolution by natural selection
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what are characteristics of an evolution free population?
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no mutation
no gene flow between populations populations must be very large (no genetic drift ) mating must be random no natural selection |
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genetic drift
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chance events in evolution
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Hardy Weinberg principle
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equilibrium conditions- allele frequencies will remain the same indefinitely
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what causes evolution
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conclude that is any deviation from any of Hardy Weinberg Equilibrium
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gene flow
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movement of alleles into or out of a population by immigration or emigration
helps keep populations of same species similar counters processes that cause populations to diverge |
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bottleneck effect
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an event that greatly reduces the population size
remaining alleles are often left due to chance leads to allele fixation |
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founder effect
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founder effect a subset of an original population relocates to a new habitat
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