Exam 3 Codon

Gene flow

An evolutionary process that changes allele frequencies through the movement of individuals and their alleles from one population to another. Homogenizes allele frequencies among populations.

Maladaptive

Leading to lower fitness

Mutation

Any change in the sequence of DNA, and thus a change in genetic information. Introduces new alleles into population

Deleterious mutation

A mutation or other event that lowers fitness

Genetic drift

Any change that occurs in allele frequencies that is due to chance

Founder events

One of the several types of events that can cause genetic drift. They occur when a relatively small number of individuals disperse to a new habitat and found a completely new population.

Genetic bottlenecks

One of the several types of events that can cause genetic drift. They occur when a species undergoes a large and rapid decrease in population size due to a disease epidemic, catastrophic storm, or other change.