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| change in inherited characteristics of populations of organisms over many generations |
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| Two important components of darwins theory |
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Definition
| heritable variation and natural selection |
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| heritable characteristics passed to offspring |
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| change in heritable characteristics over time |
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| group of populations that can interbreed |
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| local group of interbreeding species |
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| unifies/defines population - total of all alleles |
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| genetic contribution to future generations |
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| change in allele frequencies within a population from generation to generation |
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| alleles remain equal unless acted upon - provides standard for evolutionary change |
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| 5 conditions for no evolution |
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Definition
1 no mutations
2 isolated population
3 large population
4 random mating
5 no natural selection |
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| 4 main evolutionary processes |
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Definition
| mutations, gene flow, genetic drift, natural selection |
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| provide raw material for evolutionary change |
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| changes due to change - bottleneck - founder effect |
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| Biological Species Concept |
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Definition
| based on genetic isolation and difficult to apply |
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| Morphological Species Concept |
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| bases on anatomy and morphology - practical |
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| Phylogenetic species concept |
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Definition
| based on evolutionary history |
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| geographic barriers - river |
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| higher taxa - gerera families |
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