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Evolution Vocab

Evolution, Chapter 11 Vocab

TermDefinition
convergent evolution evolution toward similar features in unrelated species
divergent evolution closely related species that evolve in different directions
microevolution a generation to generation change in allele frequency
homologous body parts that are similar in structure, but used differently
analogous body parts that perform similar function but originate differently
vestigial small, leftover body parts that no longer have a use in the organism
mass extinction happens at global level, caused by catasrophism event
extinction elimination of species
adaptive radiation one ancestral species evolves into many different species
punctuated equilibrium life changes slowly then periods of quick evolutionary change happen
background extinction extinctions that occur at a continual low rate
stabilizing selection extreme phenotypes eliminate, narrow range of phenotypes
directional selection one extreme is eliminated, population favors other extreme
disruptive selection extreme phenotypes favored, mean reduced
normal distribution average is normal, few extremes
genetic drift change in allele frequency due to chance
bottleneck effect occurs when an event drastically reduces population
founder effect occurs when a few individuals start a new population
gene flow movement of alleles between populations
behavioral isolation based on differences of courtship or mating behaviors
temporal isolation timing prevents reproduction between populations
geographic isolation isolation caused by barriers
allele form of a gene
allele frequency measure of how common an allele is in a gene pool or population
gene pool all alleles of a group
speciation new species evolves
Created by: kendallfaith24
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