BIO 101 - CHAPTER 13 - EVOLUTION
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8 terms
Terms | Definitions |
|---|---|
 bottleneck effect | Genetic drift that occurs when the size of a population is reduced, as by a natural disaster or human actions. Typically, the surviving population is no longer genetically representative of the original population. |
| genetic drift | The gradual changes in gene frequencies in a population due to random events |
| founder effect | when a few individuals become isolated from a larger population, this smaller group may establish a new population whose gene pool isn't reflective of the source population |
| batesian mimicry | evolution by one species to resemble the coloration body shape or behavior of another species that is protected from predators by a venomous stinger bad taste or some other defensive adaptation |
| selective pressure | when the environment pushes an individual or population to adapt or evolve |
| quantitative inheritance | a phenotypic intermediate between two parents. polygenic traits controlled by more than one locus. ex: height. |
| polymorphism | the existence of two or more forms of individuals within the same animal species |
| polygenes | more than one gene affecting expression of a characteristic |
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