Anagenesis


Anagenesis

Anagenesis, also known as "phyletic change", is the evolution of species involving a change in gene frequency in an entire population rather than a branching event, as in cladogenesis. When enough mutations reach fixation in a population to significantly differentiate from an ancestral population, a new species name may be assigned. A key point is that "the entire population" is different from "the ancestral population" such that the ancestral population can be considered extinct.

It is easy to see from the preceding definition how controversy can arise among taxonomists when the differences are significant enough to warrant a new species classification. Anagenesis may also be referred to as "gradual evolution".

External links

* [http://www.mun.ca/biology/scarr/Cladogenesis_Anagenesis_Exintction.htm Diagram contrasting Anagenesis and Cladogenesis from the University of Newfoundland]


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  • Anagénesis — Saltar a navegación, búsqueda La anagénesis o evolución filética es la evolución progresiva de las especies que implica un cambio en la frecuencia genética de una población entera en lugar de un suceso de bifurcación cladogenético. Cuando en una… …   Wikipedia Español

  • anagénesis — f. histol. Conjunto de procesos que producen la regeneración hística. Medical Dictionary. 2011 …   Diccionario médico

  • anagenesis — anagenesis. См. анагенез. (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.

  • anagenesis — noun Etymology: New Latin Date: 1889 evolutionary change producing a single lineage in which one taxon replaces another without branching compare cladogenesis …   New Collegiate Dictionary

  • anagenesis — evolutionary change along an unbranching lineage (no new species arise) or when one species transforms into another across time …   Dictionary of ichthyology

  • anagenesis — anagenetic /an euh jeuh net ik/, anagenetical, adj. /an euh jen euh sis/, n. 1. Biol. the progressive evolution of a species. Cf. catagenesis. 2. Physiol. the regeneration of tissue. [1875 80; < NL; see ANA , GENESIS] * * * …   Universalium

  • anagenesis — noun The evolution of a new species by the large scale change in gene frequency so that the new species replaces the old rather than branching to produce an additional species …   Wiktionary

  • anagenesis — 1. Repair of tissue. 2. Regeneration of lost parts. [G. ana, up, + genesis, production] …   Medical dictionary

  • anagenesis — n. progressive development of species (Biology) …   English contemporary dictionary

  • anagenesis — an·a·gen·e·sis …   English syllables


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