Difference between revisions of "Genetic markers"
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Revision as of 19:09, June 19, 2009
A genetic marker is a segment of DNA having an identifiable physical location on a chromosome and an inheritance that can be followed.
A marker can be a gene, or it can be some section of DNA with no known function.
Because DNA segments that lie near each other on a chromosome tend to be inherited together, markers are often used as indirect ways of tracking the inheritance pattern of a gene that has not yet been identified, but whose approximate location is known.