Term
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Definition
| the short term adaptations that result from changes in the enviroment |
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Term
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Definition
| the process of the development of new species from common ancestors |
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Term
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Definition
-individuals display the aquisition of traits - organisms develop strengths during lifetime, pass on to progeny -FALSE! |
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Term
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Definition
| species have different abilities to obtains resources |
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Term
five evidence of evolution |
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Definition
1)biogeography 2) fossil record 3)comparative anatomy 4)comparative embryology 5) molecular biology |
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Term
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Definition
-island species are derived from nearby continents -isolation is sufficent to result in significant variation in the phenotypes of new populations |
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Term
| Modern Synthesis View of Darwinism |
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Definition
-ultimate base of all biological change (evolution) is mutation in the DNA |
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Term
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Definition
| collection of genes in a population |
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Term
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Definition
| -the conventional view might be that dominant alleles would eventually cocme to dominate the gene pool, when in fact allele frequencies only change when influenced by other factors. |
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Term
Requirements of Hardy-Weinberg Equilibrium [5] |
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Definition
-Large Poplulation size -no migration -random mating -no net mutations -no natural selection |
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Term
| Factors that upset genetic equilibrium and result in microevolution [5] |
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Definition
-mutation -nonrandom mating -genetic drift -gene flow -natural selection |
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Term
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Definition
| changes in the gene pool of a small population due to chance (reduces genetic variability) |
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Term
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Definition
| type of genetic drift resulting from a reduction in population, such that the surviving population is no longer genetically representative of the original population |
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Term
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Definition
| cause of genetic drift by a limited number of individuals from a parent population |
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Term
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Definition
genetic exchange due to migration of fertile indiviudals or gametes between populations |
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Term
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Definition
| extremes are selected against, center stays the same and grows in number |
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Term
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Definition
| one tail of the distribution is selected against and the opposite tail grows in numbers |
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Term
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Definition
| a mid-group is selected against, the tails are allowed to predominate and grow compared to the middle |
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Term
| Biological Species Concept |
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Definition
| a group of populations whose members have the potential to interbreed and produce viable, fertile offspring and that is genetically isolated from other populations |
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Term
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Definition
| accumulation of heritable changes |
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Term
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Definition
| budding of new species from a parent species that continues to exsist |
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Term
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Definition
-habitat -behavioral -temporal -mechanical -gametic |
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Term
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Definition
-reduced hybrid viability -reduced hybrid fertility -hybrid breakdown |
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Term
| reduced hybrid viability example |
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Definition
| frogs, zygotes fail to develop or reach sexual maturaity |
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Term
example of reduced hybrid fertility
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Definition
mule, can't breed with other mules, horses, or donkeys |
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Term
| example of hybrid breakdown |
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Definition
| 2nd generation of cotton cannot reproduce |
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Term
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Definition
| populations segregated by a geographical barrier [islands] |
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Term
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Definition
| reproductively isolated subpopulation in the midst of its parent population |
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