centimorgan

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Mor·gan

(mōr'găn),
Harry de R., British physician, 1863-1931. See: Morgan bacillus.

mor·gan (M),

(mōr'găn),
The standard unit of genetic distance on the genetic map: the distance between two loci such that on average one crossing over will occur per meiosis; for working purposes, the centimorgan (0.01 M) is used.
[T.H. Morgan, U.S. geneticist, 1866-1945]

map unit

An arbitrary unit for the distance between genes, usually derived from the percentage of recombination, but also defined by the time at which the gene is transferred during conjugation. One map unit corresponds to a recombination frequency of 1%.

mor·gan

(mōr'găn)
The standard unit of genetic distance on the genetic map: the distance between two loci such that on average one crossing over will occur per meiosis; for working purposes, the centimorgan (0.01 M) is used.
[T.H. Morgan, U.S. geneticist, 1866-1945]

centimorgan

A unit of distance between two genes on a chromosome, representing a 1 per cent probability of recombination in a single meiotic event. Named after Thomas Hunt Morgan (1866–1945) the American Nobel-prizewinning geneticist often described as the father of modern genetics.
References in periodicals archive ?
Jacobs was the most connected of our group in terms of total centimorgans, and also had the longest pedigree: He was descended from the Gaon of Vilna, a preeminent 18th-century rabbi.
Abbreviations: BLSB, banded leaf and sheath blight; SSR, simple sequence repeat; CIM, composite interval mapping; QTL, quantitative trait loci; MAS, marker-assisted selection; AG, anastomosis groups; GCA, general combining ability; PDA, potato dextrose agar; PH, plant height; DI, disease index; cM, centimorgan; LR, likelihood-ratio; LOD, log likelihood ratio.
The region of interest was very broad, spanning approximately 57 Kosambi centimorgans. No evidence for linkage to this region of chromosome 1 was found in another study (Cardon et al., 1994).
(1998) identified a quantitative trait locus for saturated and monounsaturated fatty acid composition of subcutaneous fat located at 18 centimorgans from the centromere on bovine chromosome BTA19.
The combined genome scan data included 458 markers that were typed in 2 or more scans, which were included separately on the genetic map for the scan, separated by a very small distance [0.001 centimorgans (cM)].
The map distance (centimorgans) was calculated using the number of recombinants divided by the total number of meioses (3822), multiplied by 100.
For example, Young and Tanksley (1989) found an introgressed chromosome segment more than 50 centiMorgans long following 11 generations of backcrossing.
We found four pairs of third cousins who share SO centimorgans (cM) and above of DNA, and five pairs of third cousins who share between 40cM and 49.9cM.
LD has been shown to extend over long distances (on the order of tens of centimorgans) in livestock species (Farnir et al., 2000; McRae et al., 2002; Harmegnies et al., 2006), in contrast to the small extent of LD in the human genome.
(1998) found that the restriction fragment length polymorphism locus XksuA1, mapped to 7DL through aneuploid analysis, is linked to Dn2 at a distance of 9.8 centimorgans (cM).
For comparative purposes, regions were identified by SIM where there was a gap of at least 10 centimorgans between significant intervals.
The genetic map spans 5630 centimorgans (eM), with the number of mapped unigenes ranging from 21 on chromosome 9 to 54 on chromosome 1.