homeotic gene

homeotic gene
Gene, containing homeobox, the level of expression of which is set during embryogenesis in response to positional cues, and which then directs the later formation of tissues and appendages appropriate to that part of the organism. Mutation of these genes leads to inappropriate expression of characteristics normally associated with another part of the organism (homeotic mutants.

Dictionary of molecular biology. 2004.

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  • Homeotic gene — Homeotic genes specify the anterior posterior axis and segment identity during early development of metazoan organisms. They are critical for the proper placement and number of embryonic segment structures (such as legs, antennae and eyes).The… …   Wikipedia

  • homeotic gene — n a gene that produces a usu. major shift in the developmental fate of an organ or body part esp. to a homologous organ or part normally found elsewhere in the organism …   Medical dictionary

  • homeotic gene — noun one the genes that are involved in embryologic development • Hypernyms: ↑gene, ↑cistron, ↑factor • Hyponyms: ↑homeobox, ↑homeobox gene * * * noun : a gene that produces a usually major shift in the developmental fate of an organ or body pa …   Useful english dictionary

  • homeotic — Pertaining to or characterized by homeosis. * * * ho·me·ot·ic also ho·moe·ot·ic .hō mē ät ik adj relating to, caused by, or being a homeotic gene <a homeotic mutant causing replacement of an antenna by a leg in a fruit fly>… …   Medical dictionary

  • 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

  • homeotic — adjective Etymology: from homeosis, homoeosis a shift in structural development, from Greek homoiōsis assimilation, resemblance, from homoioun to make like, from homoios Date: 1894 relating to, caused by, or being a gene producing a usually major …   New Collegiate Dictionary

  • homeobox gene — noun one of various similar homeotic genes that are involved in bodily segmentation during embryonic development • Syn: ↑homeobox • Hypernyms: ↑homeotic gene * * * /hoh mee euh boks / any of a group of genes whose function is to divide the early… …   Useful english dictionary

  • Hox gene — Hox genes are a group of related genes that determine the basic structure and orientation of an organism.[1] Hox genes are critical for the proper placement of segment structures of animals during early embryonic development (e.g. legs, antennae …   Wikipedia

  • MADS-box — The MADS box is a conserved sequence motif found in genes which comprise the MADS box gene family.[1] The MADS box encodes the DNA binding MADS domain. The MADS domain binds to DNA sequences of high similarity to the motif CC[A/T]6GG termed the… …   Wikipedia

  • Desarrollo floral — Diagrama de la expresión diferencial de los genes A, B y C en los distintos verticilos de una flor de Arabidopsis. El desarrollo floral o desarroll …   Wikipedia Español

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