A series of similar in successive , producing evolutionary change.

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  • Orthogenesis — Orthogenesis, orthogenetic evolution, progressive evolution or autogenesis, is the hypothesis that life has an innate tendency to evolve in a unilinear fashion due to some internal or external driving force . The hypothesis is based on… …   Wikipedia

  • orthogenesis — orthogenesis. См. ортоэволюция. (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.

  • Orthogeněsis — (griech., »geradlinige [bestimmt gerichtete] Entwickelung«), die allmählich verstärkte Ausprägung bestimmter Merkmale, die dadurch hervorgerufen wird, daß die aufeinander folgenden Generationen einer Tier oder Pflanzenart stets in gleicher… …   Meyers Großes Konversations-Lexikon

  • orthogenesis — [ôr΄thō jen′ə sis] n. [ModL: see ORTHO & GENESIS] 1. Biol. a now discredited theory that states that the progressive evolution of certain organisms in a restricted direction throughout successive generations is independent of outside influences… …   English World dictionary

  • orthogenesis — /awr theuh jen euh sis/, n. 1. Biol. a. Also called orthoselection. evolution of a species proceeding by continuous structural changes in a single lineage without presenting a branching pattern of descent. b. a theory that the evolution of a… …   Universalium

  • orthogenesis — noun Etymology: New Latin Date: 1895 variation of organisms in successive generations that in some especially former evolutionary theories takes place in some predestined direction resulting in progressive evolutionary trends independent of… …   New Collegiate Dictionary

  • orthogenesis — n. [Gr. orthos, straight; genesis, beginning] Evolution following a predetermined rectilinear pathway, independent of natural selection …   Dictionary of invertebrate zoology

  • orthogenesis — The doctrine that evolution is governed by intrinsic factors and occurs in predictable directions. [ortho + G. genesis, origin] * * * or·tho·gen·e·sis .ȯr thə jen ə səs n, pl e·ses .sēz variation of organisms in successive generations that in… …   Medical dictionary

  • orthogenesis — directional evolution of organisms Causation and Formation …   Phrontistery dictionary

  • orthogenesis — n. theory that evolution of a species is predetermined and is unaltered by outside influences (Biology); theory that all cultures must pass through determined identical stages (Sociology) É”rθə dÊ’É™nɪsɪs / ɔːθ …   English contemporary dictionary

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