Parthenogenesis
Development of a germ cell without fertilization. This is what happens in the formation of ovarian teratomas (dermoid cysts). All of the chromosomes in these benign tumors of the ovary come from the mother. The counterpart of the ovarian teratoma is the hydatidiform mole, a tumor that forms within the uterus. All the chromosomes in hydatidiform moles come from the male partner. While both ovarian teratomas and hydatidiform moles are the products of parthenogenesis, ovarian teratomas are of gynecogenic (female) origin while hydatidiform moles are of androgenic (male) origin. The term "parthenogenesis" comes from the Greek "parthenos" (virgin) + "genesis" (generation). The Greek goddess Artemis (called Parthenos, the virgin) was associated with nymphs who became pregnant and were transformed into beasts.
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A form of nonsexual reproduction, or agamogenesis, in which the female reproduces its kind without fecundation by the male. SYN: apogamia, apogamy, apomixia, virgin generation. [G. parthenos, virgin, + genesis, product]

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par·the·no·gen·e·sis .pär-thə-nō-'jen-ə-səs n, pl -e·ses -.sēz reproduction by development of an unfertilized usu. female gamete that occurs esp. among lower plants and invertebrate animals

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n.
reproduction in which an organism develops from an unfertilized ovum. It is common in plants and occurs in some lower animals (e.g. aphids).

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par·the·no·gen·e·sis (pahr″thə-no-jenґə-sis) [Gr. parthenos virgin + -genesis] a modified form of sexual reproduction with development of a gamete without fertilization, as occurs in some plants and invertebrates, especially arthropods including honey bees and wasps, and in certain lizards. It may occur as a natural phenomenon or be induced by chemical, thermal, or mechanical stimulation (artificial p.).

Medical dictionary. 2011.

Look at other dictionaries:

  • Parthenogenesis — (from the Greek παρθένος parthenos , virgin , + γένεσις genesis , creation ) is an asexual form of reproduction found in females where growth and development of embryos or seeds occurs without fertilization by a male. The offspring produced by… …   Wikipedia

  • parthenogenesis — par the*no*gen e*sis (p[aum]r th[ e]*n[ o]*j[e^]n [ e]*s[i^]s), n. [Gr. parqe nos a virgin + E. genesis.] 1. (Biol.) The production of new individuals from virgin females by means of ova which have the power of developing without the intervention …   The Collaborative International Dictionary of English

  • parthenogenesis — parthenogenesis. См. девственное размножение. (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.

  • Parthenogenĕsis — (gr.), so v.w. Generationswechsel, s.u. Metamorphose …   Pierer's Universal-Lexikon

  • Parthenogenĕsis — (gr.), heißt auch das Entstehen von Thieren aus unbefruchteten Eiern, s.u. Zeugung S. 564 …   Pierer's Universal-Lexikon

  • Parthenogenesis — (griech., Jungfernzeugung), eine Art der Fortpflanzung, bei der sich das Ei ohne Befruchtung durch den Samen entwickelt. Bei der P. muß also wie bei der zweigeschlechtlichen Fortpflanzung ein weibliches Tier vorhanden sein, aber nur dieses allein …   Meyers Großes Konversations-Lexikon

  • Parthenogenesis — Parthenogenĕsis (grch.), Jungfernzeugung, die Hervorbringung entwicklungsfähiger Eier oder lebendiger Junger ohne vorausgegangene Begattung (bes. bei Krustazeen und Insekten). – Vgl. von Siebold (1856), Karsten (1888), Taschenberg (1892) …   Kleines Konversations-Lexikon

  • parthenogenesis — (n.) reproduction without fertilization, 1849, from Gk. parthenos virgin, of unknown origin, + genesis (see GENESIS (Cf. genesis)) …   Etymology dictionary

  • parthenogenesis — ► NOUN Biology ▪ reproduction from an ovum without fertilization, especially in some invertebrates and lower plants. DERIVATIVES parthenogenetic adjective. ORIGIN from Greek parthenos virgin + genesis creation …   English terms dictionary

  • parthenogenesis — [pär΄thə nō΄jen′ə sis] n. [ModL < Gr parthenos, maiden, virgin + genesis, origin: see GENESIS] reproduction by the development of an unfertilized ovum, seed, or spore, as in certain insects or algae: it may be induced artificially by chemical… …   English World dictionary

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