heterochrony

het·er·och·ro·ny -'räk-rə-nē n, pl -nies
1) deviation from the typical embryological sequence of formation of organs and parts as a factor in evolution
2) irregularity in time relationships specif the existence of differences in chronaxies among functionally related tissue elements
het·er·och·ro·nous -'räk-rə-nəs adj

* * *

het·er·och·ro·ny (het″ər-okґrə-ne) [hetero- + chron-] 1. the formation of parts or tissues, or the occurrence of a phenomenon, at an unusual time. Cf. synchronia (def. 2). 2. a difference in the rate or time of occurrence between two processes. Called also heterochronia.

Medical dictionary. 2011.

Look at other dictionaries:

  • heterochrony — heterochrony. См. гетерохрония. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Heterochrony — In biology, heterochrony is defined as a developmental change in the timing of events, leading to changes in size and shape. There are two main components, namely (i) the onset and offset of a particular process, and (ii) the rate at which the… …   Wikipedia

  • Heterochrony — Heterochronism Het er*och ro*nism, Heterochrony Het er*och ro*ny, n. [Gr. ? of different times; ? other + ? time.] (Biol.) In evolution, a deviation from the typical sequence in the formation of organs or parts. [1913 Webster] …   The Collaborative International Dictionary of English

  • heterochrony — noun see heterochronism * * * heterochronic /het euhr euh kron ik/, heterochronistic, heterochronous, adj. /het euh rok reuh nee/, n. Biol. a genetic shift in timing of the development of a tissue or anatomical part, or in the onset of a… …   Useful english dictionary

  • heterochrony — Lack of synchronization …   Dictionary of molecular biology

  • heterochrony — heterochronic /het euhr euh kron ik/, heterochronistic, heterochronous, adj. /het euh rok reuh nee/, n. Biol. a genetic shift in timing of the development of a tissue or anatomical part, or in the onset of a physiological process, relative to an… …   Universalium

  • heterochrony — noun the variation in ontogeny of individuals of a species that gives rise to evolution …   Wiktionary

  • heterochrony — het·er·och·ro·ny …   English syllables

  • гетерохрония — heterochrony гетерохрония. Изменение в процессе эволюции скорости эмбрионального развития различных органов; формы Г. акселерация (ускорение развития) и ретардация (замедление); Г. лежит в основе педоморфоза <paedomorphosis> и фетализации… …   Молекулярная биология и генетика. Толковый словарь.

  • Ontogeny and Phylogeny (book) — Ontogeny and Phylogeny is Stephen Jay Gould s first technical book, published in 1977 by Belknap, a division of Harvard University Press. Gould wrote that Ernst Mayr suggested in passing that he write the book, but that I only began it as a… …   Wikipedia

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