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Evolution
change in a population through time
Mutation
random change in DNA
Gene flow
when alleles move from one population to another
Natural selection
when an heritable trait affords advantages/disadvantages in survival or reproduction, it increases or decreases in frequency through time
Sexual selection
when an heritable trait affords advantages/disadvantages in access to more or better mates, it increases or decreases in frequency through time
Genetic drift
a change in allele frequencies
Founder effect
when a small group leaves a parent population to start a new one, the daughter population is different from the parent population due to sampling error
Bottlenecking
when survivorship through a drastic population reduction is random, the daughter population is different from the parent population due to sampling error
