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Definition
-Group of individuals of the same species at the same time in the same place
-Populations evolve not individuals: natural selection acts on them cause evolution |
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Term
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Definition
-Change genetic makeup of small population done by chance
-Bottleneck and Founder effects |
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Definition
-Results from some sort of disaster
-Ex: Population is less than 100 and a tornado kils a lot of them
-Ex: Cheetahs |
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Term
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Definition
-Colonization of a new area by a few individuals
-All offspring are going to have similar genetics to the founders
-Ex: Birds get blown off course to an island
-Ex: amish: close knit breeding |
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Definition
-Movement of individuals throughout range of species
-Genes spread out and mix throughout the population
-genetics move
-Advantageous
-All the species remain the same throughout the entire poulation |
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Definition
| Species throughout the continent (where they live) |
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Definition
-Difference in base sequence
-gets spread far if advantageous but stopped if it is not |
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Term
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Definition
-Mating is not a random event
-preferential mating
-mates chose each other (based on territory, song....)
-Choosing which genetics to put together |
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Term
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Definition
-Adaptive changes in genetic makeup of a population
-adapts populations to the environment
-fitness
-acts on the whole organism to decide whether they live or die |
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Term
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Definition
-Favors the mean or average individual
-Selects against extremes
-Decreasing extremes
-Ex: human birth rate |
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Term
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Definition
-selects against one extreme or the other
-all individuals selected for except one of certain extreme
-happens in a change in environment
-Ex: pepper moths |
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Term
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Definition
-When environmental conditions so varied that either extreme is good
-Ex: sex |
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Definition
-Ex: sea lions
-Ex: color in birds |
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