chap.16 bio
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25 terms
Terms | Definitions |
|---|---|
 Population genetics | the study of evolution from a genetic change point of view |
| gene pool | genetic information avalible in a population |
| allele frequency | frequency among a certain allele in a population |
| phenotype frequency | frequency of an individual phenotype in a population. with a particular phenotype |
| Hardy-Wenberg genetic equilibrium | allele frequency in a population remain the same generation to gene ration |
| the smallest unit in which evolution occurs is | a population |
| Length,weight, and many other quantitive traits in a population tend to show variation that, when plotted on a graph looks like. | a bell curve |
| If a population of four o'clock flowers consists of five RR plants(red flowers, two Rr plants(pink flower), and one rr plant9white flowers, the phenotype frequency of plants with pink flowers is. | 0.25 |
| For a population to be in genetic material | individuals must not enter or leave the population |
| immigration,emigration | immigration= movement of individuals into a population. emigration- individuals out of a population |
| gene flow,genetic drift | gene flow= movement of genes form one population to another. Genetic drift= strongly felt in small populations. A random change in allele frequency. |
| random mating, assortative mating | random mating=occurs without regard to genetic make up. assortative= mating based on similar characteristics |
| stabilizing selection,directional selection | stabilizing selection=individuals average traits best fit. directional selections=one extreme or the other extreme is selected for. Has highest fitness. |
| one limitation of the morphological species concept is that | there can be morphological diffrences among individuals in a single population |
| according to the biological species concept, a species is a population of organisms that | can successfully interbreed but cannot breed with other groups |
| fish populations that do not not interbreed because the live in diffrent ponds may evolve into separate species due to | geographic isolation |
| a pattern of rapid evolutionary changes followed by long periods of no change is described as | punctuated equillibrium |
| morphology | interna and external structures and the apperance of organisms. used to classaify organisms. |
| geographic isolation | physical seperation of the members of a population |
| punctuated equilibrium | pattern of species formatin in which periods of speciation are presede and followed by log periond little of no specifation |
| any violation of the conditions necessary for Hardy-Weinberg equilibrium can result in | evolution |
| The movement of reproductive individuals from one population to another is a result in | gene flow |
| genetic drift is most likely to occur in | small populations |
| assortive mating occurs when | an individual chooses mattes that ar similar to itslef |
| startlings produce an average of five eggs in each clutch. If there are more than five, the parents can not adquately feed the young. If there are fewer than five, predators may destroy the entire clutch. This is an exampl of. | stabilizing selection |
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