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16-2question
| Question | Answer |
|---|---|
| how Natural selection on single-gene traits can lead to changes in allele frequencies and thus to evolution | a mutation in one gene that determines body color in lizards can affect their lifespan |
| what is meant by directional selection | when individuals with traits on one side of the mean in their population survive better or reproduce more than those on the other. |
| what impact stabilizing selection has on a population | decrease of a population 's genetic variance |
| what impact disrupting selection has on a population | cause organsisms with intermediate traits to reproduce less, and will allow those organisms with extreme traits to reproduce more |
| genetic drift | variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce. |
| how a founder effect can happen | If a small population breaks off from a larger population to colonize an island, |
| the Hardy-Weinberg Principle | he genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors. |
| How do you know when a population hits genetic equilibrium | No gene mutations may occur and therefore allele changes do not occur |
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