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11 Cards in this Set
- Front
- Back
Evolution
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Genetic and phenotypic changes occurring in populations of organisms through time, generally resulting in increased adaptation for continued survival.
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Evolution Example
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The evolution of shell shape oysters.
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Bottleneck Effect-Genetic Drift
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Evolution by chance process. * Parent population->Bottleneck (drastic reduction in population)->Surviving individuals->next generation.
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Species
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A group of morphologically similar ( common gene pool ) organisms that are capable of interbreeding and producing fertile offspring and reproductively isolated.
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Microevolution vs Macroevolution
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Microevolution-Deals primarily with the process of evolution or change.
Macroevolution- Deals with the patterns of diversity of life. |
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Macroevolution
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1. Refers to large-scale patterns, trends, and rates of change among higher-taxa groupings of species.
2. Is driven by Microevolutionary processes such as mutation, natural selection, and genetic drift change allele frequencies in reproductively isolated populations. |
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Lethal Mutation
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An expression of a gene that results in death.
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Mutation
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A change in DNA; provides the ultimate source for phenotypic variation
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Harmful Mutation
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Those that bestow survival disadvantages.
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Neutral Mutations
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Those that have no effect on survival and reproductions.
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Beneficial Mutations
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Those that bestow survival advantages.
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