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Genetic marker

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Definition

noun, plural: genetic markers

A gene or (a fragment of) DNA sequence having a known location on a chromosome, has an easily identifiable phenotype and whose inheritance pattern can be followed.


Supplement

Genetic markers act as chromosomal landmarks. They are used to trace or identify specific region of a gene (especially one that is associated with an inherited disease) on a chromosome. They are also used to determine a linkage group or a recombination event.


Also called: marker, marker gene, DNA marker.
See also: genetic map.