Position effect is the effect on the expression of a gene when its location in a chromosome is changed, often by translocation. This has been well described in Drosophila with respect to eye color and is known as position effect variegation (PEV). The phenotype is well characterised by unstable expression of a gene that results in the red eye colo...
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http://en.wikipedia.org/wiki/Position_effect
A change in the phenotypic expression of one or more genes due to a change in its physical location with respect to other genes; may result from change in chromosome structure or from crossing-over. ... (05 Mar 2000) ...
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http://www.encyclo.co.uk/local/20973
in genetics, the change in expression of a gene as a function of a change in its position relative to that of other genes.
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http://www.encyclo.co.uk/local/21001
Effect on the expression of a gene depending upon its position relative to other genes on the chromosome. Moving (transposing) a gene from an inactive region to an active region can alter expression markedly - sometimes with unfortunate consequences as with the Philadelphia chromosome abnormality that leads to CML.
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Type: Term Definitions: 1. a change in the phenotypic expression of one or more genes due to a change in its physical location with respect to other genes; may result from change in chromosome structure or from crossing-over.
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http://www.medilexicon.com/medicaldictionary.php?t=28038
[
n] - (genetics) the effect on the expression of a gene produced by changing its location in a chromosome
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http://www.webdictionary.co.uk/definition.php?query=position%20effect
noun (genetics) the effect on the expression of a gene that is produced by changing its location in a chromosome
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https://www.encyclo.co.uk/local/20974
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