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Gene flow
Gene flow — also called
migration — is any movement of genes from one population to
another. Gene flow includes lots of different kinds of events, such
as pollen being blown to a new destination or people moving to new
cities or countries. If genes are carried to a population where those genes previously did not exist,
gene flow can be a very important source
of genetic variation. In the
graphic below, the gene for brown coloration moves from one population to another.
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