one gene/one polypeptide

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• one gene–one polypeptide chain hypothesis — the hypothesis that each gene codes for the production of a single polypeptide chain; there are exceptions, e.g., antibody genes, in which separate genes for variable and constant regions are rearranged to code for a single polypeptide …   Medical dictionary

• One gene-one enzyme hypothesis — The one gene one enzyme hypothesis is the idea that genes act through the production of enzymes, with each gene responsible for producing a single enzyme that in turn affects a single step in a metabolic pathway. The concept was proposed by… …   Wikipedia

• gene — /jeen/, n. the basic physical unit of heredity; a linear sequence of nucleotides along a segment of DNA that provides the coded instructions for synthesis of RNA, which, when translated into protein, leads to the expression of hereditary… …   Universalium

• Gene — /jeen/, n. a male given name, form of Eugene. * * * I Unit of heredity that occupies a fixed position on a chromosome. Genes achieve their effects by directing protein synthesis. They are composed of DNA, except in some viruses that contain RNA… …   Universalium

• one gene–one enzyme hypothesis — the hypothesis that each gene is responsible for making a single enzyme; modified to the one gene–one polypeptide chain hypothesis when enzymes composed of multiple heterogeneous polymers were discovered …   Medical dictionary

• Gene expression — For vocabulary, see Glossary of gene expression terms. For a non technical introduction to the topic, see Introduction to genetics. Genes are expressed by being transcribed into RNA, and this transcript may then be translated into protein. Gene… …   Wikipedia

• Gene — The basic biological unit of heredity. A segment of deoxyribonucleic acid (DNA) needed to contribute to a function. An official definition: According to the official Guidelines for Human Gene Nomenclature, a gene is defined as a DNA segment that… …   Medical dictionary

• Gene — For a non technical introduction to the topic, see Introduction to genetics. For other uses, see Gene (disambiguation). This stylistic diagram shows a gene in relation to the double helix structure of DNA and to a chromosome (right). The… …   Wikipedia

• Gene duplication — Schematic of a region of a chromosome before and after a duplication event Gene duplication (or chromosomal duplication or gene amplification) is any duplication of a region of DNA that contains a gene; it may occur as an error in homologous… …   Wikipedia

• gene — noun Etymology: German Gen, short for Pangen, from pan + gen Date: 1911 a specific sequence of nucleotides in DNA or RNA that is located usually on a chromosome and that is the functional unit of inheritance controlling the transmission and… …   New Collegiate Dictionary

• Small nuclear ribonucleoprotein polypeptide N — Small nuclear ribonucleoprotein polypeptide N, also known as SNRPN, is a human gene.cite web | title = Entrez Gene: SNRPN small nuclear ribonucleoprotein polypeptide N| url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene Cmd=ShowDetailView… …   Wikipedia