Radience

Evolution of Populations

Science

adaptive radiation

the rapid diversification of one species into several different species
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allele frequency

the proportion of one allele of a gene compared to other alleles of the same gene
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behavioral isolation

isolation between populations due to differences in courtship or mating behavior
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bottleneck effect

a decrease in genetic diversity caused by a sharp decline in population size
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convergent evolution

the process by which unrelated species develop similar traits in similar environments
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directional selection

a form of natural selection which favors an uncommon trait, leading to a genetic shift of the population
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disruptive selection

natural selection which favors two extreme forms of a trait over an intermediate form
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evolution

the change in a species over time
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founder effect

a change in the gene pool caused by a small population migrating to a new area
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genetic drift

random changes in allele frequency, which usually occurs in small populations
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genetic equilibrium

a state where allele frequencies remain the same
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geographic isolation

reproductive isolation caused by physical barriers like rivers or mountains
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Hardy Weinberg principle

states that allele frequencies in a population are constant unless a factor causes change
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punctuated equilibrium

states that evolution happens in short periods, separated by long periods of stability
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reproductive isolation

occurs when two populations evolve to the point that they cannot interbreed to produce fertile offspring
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sexual selection

selection where certain traits improve mating success, and are passed on to offspring
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speciation

the evolution of new species from an existing species
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stabilizing selection

natural selection which favors average forms of a trait, these forms become more common
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temporal isolation

reproductive isolation between two populations where they reproduce at different times
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