effet de position cis-trans
- Domaine
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- biologiegénie génétique
Définition :
Changement dans le phénotype d'un hétérozygote double pour deux sites mutés, selon que ceux-ci sont portés par le même chromosome (position cis) ou répartis sur les deux homologues (position trans).
Termes :
- effet de position cis-trans n. m.
- effet cis-trans n. m.
Traductions
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anglais
Auteur : Conseil de recherches médicales du Canada,Définition
((Effect that)) consists (as shown by the cis-trans test) of different phenotypic expressions of two mutated sites within one gene or cistron; they are present in the heterozygous state and separable by genetic recombination.
Note :
The cis-configuration (both mutated sites on one chromosome, the normal sites on the other) results in a normal phenotype, the trans-configuration (one normal and one mutated site on each chromosome) in a mutant phenotype. This type of position effect can also occur over an interval greater than one cistron (intergenic cistrans position effect), between mutations occurring in the cistrons of one operon controlled by a single operator and between mutations of the operator itself.
Termes :
- cis-trans effect
- cis-trans position effect