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Definition
| Characteristics that help an individual survive and reproduce. |
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Definition
| The proportion of a partcular allele to the total number of alleles present. |
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Definition
| Any behavior that endangers an individual organism or reduces its reprductibe success but benefits other members of its species. |
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Definition
| The constant mutual feedback between two species in which the adaptations of one species cause adaptation in the other species. |
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Definition
| The simultaneous demand by two or more organisms for limited resources. |
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| The pattern of evolutionary change which favors individuals with an extreme value of a trait and selects against both average individuals and individuals at the opposite extreme. |
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Definition
| The pattern of evolutionary change which favors individuals at both extremes of a trait and selects against individuals with intermediate values. |
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Definition
| A population which does not evolve. |
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Definition
| An organism's reproductive success. |
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Definition
| A special type of population bottleneck which occurs when isolated colonies are founded by a small number of organisms. |
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Definition
| Movement of alleles into or out of a population. |
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Definition
| The sum of all the genes in a population. |
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Definition
| The process by which change events change allele frequencies in a small population. |
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Definition
| A simple mathmatical model which shows that under certain conditions, allele frequencies and genotype frequencies in a population will remain constant no matter how many generations pass. This population does not evolve. |
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Definition
| The phenomenon whereby the actions of an individual increase the survival or reproductibe success of its relatives. |
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Definition
| A change of the DNA sequence within a gene or chromosome of an organism resulting in the creation of a new character or trait not found in the parental type. |
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Definition
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Definition
| A group that includes all the members of a psecies living in a given area. |
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Definition
| When the size of a population is drasicially reduced. |
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Definition
| Any situation in which one organism eats another. |
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Definition
| The special kind of selection that acts on traits that help an animal acquire a mate. |
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Term
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Definition
| The pattern of evolutionary change which favors individuals with the average value of a trait and selects against individuals with extreme values. |
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