Heterogamy

Heterogamy

Heterogamy has a number of biological definitions:
*In reproductive biology, heterogamy is the alternation of differently organized generations, applied to the alternation between parthenogenetic and a sexual generation. This type of heterogamy occurs for example in some aphids.
*In cell biology, heterogamy is a synonym of anisogamy, the condition of having differently sized male and female gametes produced by different sexes or mating types in a species.
*In botany, a plant is heterogamous when it carries at least two different types of flowers in regards to their reproductive structures, for example male and female flowers or bisexual and female flowers. Stamens and carpels are not regularly present in each flower or floret.
*In a social context, heterogamy refers to a marriage between two individuals that differ in a certain criterion. For example, ethnic heterogamy refers to marriages involving individuals of different ethnic groups, and age-heterogamy refers to marriages involving partners of significantly different ages.The terms homogametic and heterogametic are related to heterogamy, but distinct.


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Heterogamy — Het er*og a*my, n. [See {Heterogamous}.] [1913 Webster] 1. (Bot.) The process of fertilization in plants by an indirect or circuitous method; opposed to orthogamy. [1913 Webster] 2. (Biol.) That form of alternate generation in which two kinds of… …   The Collaborative International Dictionary of English

  • heterogamy — heterogamy. См. гетерогамия. (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.

  • heterogamy — noun Date: circa 1894 1. sexual reproduction involving fusion of unlike gametes often differing in size, structure, and physiology 2. the condition of reproducing by heterogamy …   New Collegiate Dictionary

  • heterogamy — 1. Conjugation of unlike gametes. 2. Bearing different types of flowers. 3. Reproduction by indirect methods of pollination. [hetero + G. gamos, marriage] * * * het·er·og·a·my mē n, pl mies 1) sexual reproduction involving fusion of unlike… …   Medical dictionary

  • heterogamy — heterogamija statusas T sritis ekologija ir aplinkotyra apibrėžtis Dviejų nevienodo dydžio skirtingos lyties gametų susiliejimas apvaisinimo metu. atitikmenys: angl. heterogamy vok. Heterogamie, f rus. гетерогамия, f …   Ekologijos terminų aiškinamasis žodynas

  • heterogamy — heterogamija statusas T sritis augalininkystė apibrėžtis Biologinis vyksmas, kurio metu vyriški individai perduoda palikuonims kitokius genus arba jų rinkinius, negu moteriški individai. atitikmenys: angl. heterogamy rus. гетерогамия …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

  • heterogamy — n. [Gr. heteros, different; gamos, marriage] 1. Alternation of bisexual with parthenogenetic reproduction. 2. The preference of an individual to mate with an unlike phenotype or genotype; see homogamy. 3; see anisogamy …   Dictionary of invertebrate zoology

  • heterogamy — /het euh rog euh mee/, n. heterogamous state. [1870 75; HETERO + GAMY] * * * …   Universalium

  • heterogamy — noun a) The state of conjugating gametes that are different in size, structure and function b) Marriage or similar union between people of different sexes, or social strata, such as races …   Wiktionary

  • heterogamy — n. quality of having two gametes which differ in character or form (Biology) …   English contemporary dictionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”