DNA, RNA, Chromosomes, and Genes


What is a centimorgan?

A centimorgan (cM) is a way of measuring the distances between genes on a chromosome. This unit was named in honor of American biologist Thomas H. Morgan (1866–1945), who was one of the first to map genes onto chromosomes and who formulated the chromosome theory of heredity. Typically, a distance of a cM corresponds to a distance of about one million base pairs.


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