BIO 07 - 29 SEP - 7-Sources of Variation web version...

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04/26/10 1 7-Sources of Variation web version September 29
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04/26/10 2 Outline Variation revisited Types (inherited, environmental) Phenotypic versus genotypic Levels of impact (species, populations) Ultimate source of variation: Mutations Types Importance of the Central Dogma Outcomes of mutation
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04/26/10 3 Relevant readings Mutation as a relevant evolutionary mechanism p 515 Molecular basis for mutation section 16.6
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04/26/10 4 Key point: Variation is a requirement for evolution
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04/26/10 5 Variation refers to the differences among individuals Variation may be the result of gene differences then it is heritable Variation may be the result of environment (e.g, access to light, water, food)
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04/26/10 6 phenotypic and genotypic variation
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04/26/10 7 Types of phenotypic variation Heritable Non-heritable Confers fitness consequence Does not confer fitness consequence
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04/26/10 8 Variation within populations Importance of individual variation
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04/26/10 9 Variation between populations of the same species Gene flow may affect variation between populations
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BIO 07 - 29 SEP - 7-Sources of Variation web version...

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