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morgan
(redirected from Surnames, Morgan)

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.01 sec.
Morgan, Thomas Hunt 1866-1945.
American biologist. He won a 1933 Nobel Prize for establishing the chromosome theory of heredity by his studies of the fruit fly Drosophila.

mor·gan (môrgn)
n.
Abbr. M A unit for expressing the relative distance between genes on a chromosome based on the frequency with which the genes cross over; one unit equals a theoretical crossover value of 100 percent between two loci.

morgan
[môr′gən]
Etymology: Thomas H. Morgan, American biologist, 1866-1945
a unit of measure used in mapping the relative distances between genes on a chromosome. The measurement uses the total crossover value as the basic unit so that 1 morgan equals 100% crossing over or 1 centimorgan equals 1% recombination. One centimorgan is also equal to one map unit. See also map unit.


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