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compensation genes

См. также в других словарях:

  • Dosage compensation — Dosage compensation, also known as Ohno s Hypothesis, is a hypothetical genetic regulatory mechanism which operates to equalize the phenotypic expression of characteristics determined by genes on the X chromosome so that they are equally… …   Wikipedia

  • dosage compensation — n the genetic mechanism by which the same effect on the phenotype is produced by a pair of identical sex linked genes in the sex (as the human female) having the two sex chromosomes of the same type as by a single gene in the sex (as the human… …   Medical dictionary

  • dosage compensation — Genetic mechanisms that allow genes to be expressed at a similar level irrespective of the number of copies at which they are present. Usually invoked for genes that lie on sex chromosomes, that are thus present in different copy numbers in males …   Dictionary of molecular biology

  • dosage compensation — A regulatory mechanism for sex linked genes, to allow equivalent levels of gene expression from (in mammals) XY or XX genotypes, even though the gene copy number in XX is double that in XY. See: sex linkage, Barr body …   Glossary of Biotechnology

  • dosage compensation — noun : the genetic mechanism by which the same effect on the phenotype is produced by a pair of identical sex linked genes in the sex (as the human female) having the two sex chromosomes of the same type as by a single sex linked gene in the sex… …   Useful english dictionary

  • Eugenics — is the self direction of human evolution : Logo from the Second International Eugenics Conference, 1921, depicting Eugenics as a tree which unites a variety of different fields.[1] Eugenics is the applied science or the bio social movement which… …   Wikipedia

  • Circadian oscillator — Circadian oscillators are components of the biological clocks that regulate the activities of organisms in relation to environmental cycles and provide an internal temporal framework.[1] All circadian clocks, regardless of phylogenetic origin,… …   Wikipedia

  • ASSURANCE — L’assurance est une opération par laquelle une partie – l’assuré – se fait promettre, moyennant un paiement – la prime ou cotisation –, une prestation par une autre partie – l’assureur – en cas de réalisation du risque. Telle est la définition… …   Encyclopédie Universelle

  • X-inactivation — The Barr body is indicated by the arrow, it identifies the inactive X (Xi).] macroH2A1 staining. Arrow points to sex chromatin in DAPI stained cell nucleus, and to the corresponding sex chromatin site in the histone macroH2A1 staining.] X… …   Wikipedia

  • Rythme circadien bactérien — Les rythmes ciradiens bactériens, comme d autres rythmes circadiens sont endogènes. Récemment découverts, ils constituent une des formes de ce qu on appelle horloge biologique ou horloge interne. Sommaire 1 Importance biologique 2 Définition …   Wikipédia en Français

  • ITALIE - Histoire — Péninsule méditerranéenne, fortement ancrée au monde alpin, l’Italie est un pont naturel entre l’Orient et l’Occident, et participe au destin de ces deux mondes. Seule région occidentale vraiment marquée par les civilisations méditerranéennes… …   Encyclopédie Universelle

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