4 Natural selection - BIO 370 Evolution Instructor Mark Kirkpatrick p 1 4 Natural selection A look at Darwins idea of natural selection in detail

4 Natural selection - BIO 370 Evolution Instructor Mark...

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BIO 370: Evolution Instructor: Mark Kirkpatrick p. 1 4. Natural selectionA look at Darwin’s idea of natural selection in detail Did evolution occur?
BIO 370: Evolution Instructor: Mark Kirkpatrick p. 2 Quantifying fitness Fitness: The number of descendant zygotes produced by an individual, phenotype, or genotype Fitness can be decomposed into components: survival, mating success, ... Key quantities W Absolute fitness of an individual W The mean fitness of the population w = W / W The relative fitness of an individual Selection acts on differences in relative fitness How fast does a population evolve under natural selection?: One locus

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