Occasionally a small number of individuals from a large population may migrate away or become isolated from their original population. This is called a founder population
The isolated founder population is likely to have different allele frequencies to the original population causing GENETIC CHANGE
There will be no gene flow between the original population and the founder population as they are geographically isolated
Selected pressures (e.g. environmental conditions) acting on the two populations may differ significantly and this will cause the populations to diverge
This can lead to speciation (once the two populations become reproductively isolated)

	Created by mckenziedev about 11 years ago

1 Biology (AS91157 Genetic Variation & Change) Note on Genetic Change, created by mckenziedev on 07/09/2013.