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bio ch 11

TermDefinition
founder effect genetic drift that occurs after a smaller number of individuals re colonize
sexual selection certain traits increases mating success
hardy weinberg equilibrium very large population no emigration or immigration, no mutation, random mating, no natural selection.
reproductive isolation members of different population can no longer mate successfully with each other
speciation rise of two or more species from one existing species
behavioral isolation isolation caused by different courtship or mating behaviors
geographic isolation physical behaviors that divided a population into two or more groups.
temporal isolation exists when timing prevents production between populations
convergent isolation evolution of similar characteristics between unrelated species
divergent evolution closely related species evolve in different directions
gene pool the combined alleles of the individuals in a population
allele frequency a measure of how common a certain allele is in a population
normal distribution frequency is highest near the mean value and diseases toward each extreme
micro evolution the observable change in the allele frequencies of a population over time
directional selection selection that favors phenotype at one extreme
stabilizing selection phenotype favored becomes more common in a population
disruptive selection both extreme phenotypes are favored
gene flow the movement of alleles from one population to another
genetic drift causes a loss of genetic diversity
bottleneck effect genetic drift that occurs after an event greatly reduces the population
co evolution process in which two or more species evolve in response to changes
extinction the elimination of species
punctuated equilibrium states that episodes of specialization occur suddenly in geologic time
adaption radiation diversification of one ancestral species in many decendans
Created by: madqween
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