Pangenesis Pan*gen"e*sis, n. [Pan- + genesis.] (Biol.) An hypothesis advanced by Darwin in explanation of heredity. [1913 Webster]

Note: The theory rests on the assumption, that the whole organization, in the sense of every separate atom or unit, reproduces itself, the cells throwing off minute granules called gemmules, which circulate freely throughout the system and multiply by subdivision. These gemmules collect in the reproductive organs and products, or in buds, so that the egg or bud contains gemmules from all parts of the parent or parents, which in development give rise to cells in the offspring similar to those from which they were given off in the parent. The hypothesis also assumes that these gemmules need not in all cases develop into cells, but may lie dormant, and be transmitted from generation to generation without producing a noticeable effect until a case of atavism occurs. This is an ingenious hypothesis, but now known to be wrong. Although now, a hundred years later, we know that all transmitted genetic information (other than that in plasmids) is contained in the genome of a single cell, scientists are still only beginning to understand the development process. [1913 Webster +PJC]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Pangénesis — Saltar a navegación, búsqueda La pangénesis es la teoría defendida por Anaxágoras, Demócrito y los tratados hipocráticos según la cual cada órgano y estructura del cuerpo producía pequeños sedimentos llamados gémulas, que por vía sanguínea… …   Wikipedia Español

  • Pangenesis — was Charles Darwin s hypothetical mechanism for heredity. He presented this provisional hypothesis in his 1868 work The Variation of Animals and Plants Under Domestication and felt that it brought together a multitude of facts which are at… …   Wikipedia

  • pangenesis — pangenesis. См. пангенез. (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.

  • Pangeněsis — (griech.), s. Erblichkeit, S. 892 …   Meyers Großes Konversations-Lexikon

  • Pangenesis — Pangenĕsis (grch.), nach Darwin die Annahme, daß sich die Zellen des tierischen Organismus nicht nur durch Teilung fortpflanzen, sondern auch kleinste, molekülartige Körnchen (Keimchen, gemmŭlae) abgeben, die sich nach Durchwanderung des Körpers… …   Kleines Konversations-Lexikon

  • pangénesis — Teoría darwiniana de que cada célula y partícula de un progenitor se reproduce a sí misma en la descendencia. Diccionario Mosby Medicina, Enfermería y Ciencias de la Salud, Ediciones Hancourt, S.A. 1999 …   Diccionario médico

  • pangenesis — [pan jen′ə sis] n. [ModL: see PAN & GENESIS] a former hypothesis of heredity in which each unit or cell of the body throws off very minute particles (pangenes) into the blood which circulate freely, undergo division, and are collected in the… …   English World dictionary

  • Pangenesis — Francis Galton, ein Vetter von Charles Darwin, zweifelte als einer der ersten die Pangenesistheorie an Pangenesis ist ein Begriff aus der Genetik und war methodischer Ansatz Charles Darwins bei seiner Arbeit Die Variation von Tieren und Pflanzen… …   Deutsch Wikipedia

  • pangénesis — ► sustantivo femenino BIOLOGÍA Teoría que proponía que cada parte del cuerpo estaba representada por una partícula que se encontraba en la sangre. IRREG. plural pangénesis …   Enciclopedia Universal

  • pangenesis — noun Etymology: New Latin Date: 1868 a disproven hypothetical mechanism of heredity in which the cells throw off particles that collect in the reproductive products or in buds so that the egg or bud contains particles from all parts of the parent …   New Collegiate Dictionary

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