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Map Unit


map unit
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 ...
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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.
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Related Terms: Map Unit
A unit for distance in a linkage map. The distance equal to 1% recombination between two loci.
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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 ...
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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 ...
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[Link], one assumes that the the frequency of recombinants is proportional to the distance between the gene loci. In this case, 80 out of 1000 plaques were recombinant, so the distance between the h and r loci is assigned a value of 8 map units or ...
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