Genetic Drift - Founder Effect
Genetic drift describes random, non-selective change to the allele frequencies of a population. It is one of the five forces that can cause evolutionary change and is more likely to occur in small populations. To test how population size affects change, try the Population Genetics Simulation. Genetic drift is one of the five forces that can cause evolutionary change.
This simulation examines how a new population, founded by a small number of individuals, may be different from the original population. In this case, five individuals from a mainland population are transported to an island, establishing a new population. The worksheet page includes a lesson option for this activity. See the genetic drift blog post for additional discussion of the activity.
Click on the "Introduction" button to get more specific information about the simulation.