Term
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Definition
| combined information about all members of a population, including all genes and their alleles |
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Definition
| how much one allele shows up compared to the others; usually written as a percent |
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Definition
| a change in a population's relative frequency of alleles |
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Definition
the avarage phenotype shifts in one direction
[image] |
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Term
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Definition
individuals at either end of the spectrum decrease, and those with average phenotypes increase
[image] |
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Term
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Definition
individuals at the upper and lower ends of the spectrum are more fit than those in the middle
[image] |
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Term
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Definition
random, dramatic changes in allele frequencies; small populations are more subject to this
ex. several organisms in a small population are killed by chance, eliminating some alleles |
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Term
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Definition
| allele frequencies change as a result of the migration of a small subgroup of the population |
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Term
genetic equilibrium
(Hardy-Weinberg principle) |
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Definition
Allele frequencies in a population will remain constant if and only if there is:
- random mating
- a large population
- no immigration or emigration
- no DNA mutations
- no natural selection; alleles are all equally fit
- none of these exist so there is evolution; the five points explain what causes evolution |
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