Map Unit

Map Unit A unit for distance in a linkage map. The distance equal to 1% recombination between two loci. Related Terms: Linkage map ...

Map unit An arbitrary unit representing 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.

map unit See map distance; crossing-over unit. marker An identifiable DNA sequence that facilitates the study of inheritance of a trait or a gene.

A map unit or unit of physical distance on a chromosome. One centimorgan is equivalent to a 1% frequency of recombination between two linked genes.

m.u. See Map Unit Related Terms: Map Unit A unit for distance in a linkage map. The distance equal to 1% recombination between two loci.

be less common between genes adjacent to each other on the same chromosome and that it should be possible to plot the sequence of genes along a fruit fly chromosome by using crossing-over frequencies. Distances on gene maps are expressed in map units ...

(2 × 5 ÷ 1000 = 0.01 = 1 map unit) 4. Two cistrons: one containing r1 and r4, the other containing r2 and r3.

a measure of distance between two gene loci based on the frequency of crossing over between them; one map unit is equivalent to one percent crossing over Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...

"We are now down to a region of about 6 cM (gene map units, based on recombination frequency), where a year ago [the distance] was about 50," King said. "There are probably about 250 genes in the region." ...

The percent of recombination (crossing over) can beused as a measure of how far apart genes are. 1% crossing over = 1 map unit. Example G = gray body ...

See also: Gene, Recombination, DNA, Loci, Chromosome