position effect


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position effect

[pə′zish·ən i‚fekt]
(genetics)
Change in expressivity of a gene associated with changes in location on a chromosome, as from euchromatin to heterochromatin.
Inherent gene expression as influenced by neighboring genes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
According to the serial position effect, readers recall information better when it is presented first (primacy) or last (recency) in a vector of words, rather than in the middle (Baddeley and Hitch, 1977; Glanzer and Cunitz, 1966; Roediger and Crowder, 1976).
LLTM can also be used to model construct irrelevant factors such as item format effects and item position effects (Kubinger, 2009).
This method has been previously shown to be effective for resolving the position effect for EMG control [16]; it increases the repeatability between the training and testing data sets [28].
1999; Yin and Malepszy 2003) including "Position Effect" and copy number of transgene play a major role.
Locus control region function and heterochromatin-induced position effect variegation.
Keg and the Serial Position Effect: A Robust Classroom Demonstration.
(1993), we do not attach any theoretical importance to the locus of the serial position effect.
Furthermore, the investment in question will have a position effect on water quality in the North Sea; it forms part of international measures being taken forward under the 1985 Convention on the North Sea (the aim of which is to reduce the level of pollution in these waters)".
Because of the significant plot position effect and lack of interaction between plot position and treatment ([F.sub.1, 36] = 0.02, P = 0.90), we analyzed treatment effects on date of snowmelt with a randomized-blocks ANOVA on residuals from the plot position regression.

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