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21 Cards in this Set
- Front
- Back
- 3rd side (hint)
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3 types of selection |
Artificial/selective breeding Natural Sexual |
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Species |
A group of organisms similar enough that they can produce fertile offspring and are reproducing isolated from other species |
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Pre Darwin views of the world |
Based on the Christian church. God created a perfect world where humans are second to God.a |
Static/ stability theory |
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Evolution fitness |
The total size of one individual genetic contribution to the next generation |
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Adaptation |
Any physical, behavioral or psychological change that increases and organisms fitness |
Mating & prey & predator |
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Genetic variation |
The difference in genes in a population |
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Stabilizing selection |
Average expression of a trait is favored over either extreme expression of the trait |
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Directional selection |
One extreme selection of the trait is favored over the average expression of the trait |
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Disruptive selection |
Both extremes are favored over the average |
Small beak & larger beak are favored over the average regular size |
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Genetic drift |
The changes in allele frequency as a result of change |
Less of a factor |
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Genetic bottleneck |
Often a temporary reduction in a population usually resulting in a significant genetic drift |
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Founder effect |
Special firm of genetic bottleneck that occurs due to the establishing of a new colony or population |
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Mutation |
Beneficial increasing individual fitness Detrimental -decreasing individual fitness Neutral have no effect at that moment on its fitness |
Inhertiable changes in DNA |
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Evolution from a genetic point of view |
the change in gene frequencies within a problem |
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Hardy - Weinberg Law |
The relative gene frequencies within a population will remain constant |
Evolution will not occur |
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Final Darwin Statement |
Natural selection can change a species overtime or else create new species |
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Speciation |
The formation of entirely new species |
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Reduced hybrid viability |
Genetic incompability between the two species may abort development of the hybrid at some embryonic stage |
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Reduce hybrid fertility/infertility |
Largely sterile-can't breed with anything- more horse + donkeys! |
2 mules would usually result in to male mules |
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Hybrid breakdown -corn and cotton |
After cross-mate, crossmate=fertile 2nd generation = infertile |
Generatjon fertility |
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Speciation 2 |
Any process to explain how a new species forms from a previous species |
What does it form |
