Dictionary > Centimorgan

Centimorgan

Definition
noun, plural: centimorgans
A unit of recombination frequency, implying distance along a chromosome.
Supplement
One centimorgan (cM) is equivalent to a 1% chance that a marker at one genetic locus will be separated from a marker at a second locus due to crossover per generation.
In humans, 1 cM is equivalent to (on average) 1 million base pairs.
Word origin: named after geneticist Thomas Hunt Morgan by his student Alfred Henry Sturtevant.
Abbreviation: cM

See also: genetic map.


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