heterogamy

het·er·og·a·my

H0175500 (hĕt′ə-rŏg′ə-mē)n.1. Alternation of sexual and parthenogenic generations, as in some aphids.2. See anisogamy.3. The state of having different types of flowers on the same plant, as both pistillate ray florets and staminate disk florets in a flower head.4. Marriage between people who are different from each other, especially in their sociocultural backgrounds.

het′er·o·gam′ic (-rō-găm′ĭk) adj.

heterogamy

(ˌhɛtəˈrɒɡəmɪ) n1. (Biology) a type of sexual reproduction in which the gametes differ in both size and form. Compare isogamy2. (Biology) a condition in which different types of reproduction occur in successive generations of an organism3. (Botany) the presence of both male and female flowers in one inflorescence. Compare homogamy¹ ˌheterˈogamous adj

heterogamy

1. the condition of being heterogamous, or reproducing sexually and asexually in alternating generations.
2. the process of indirect pollination. Cf. heterogenesis. — heterogamous, adj.See also: Biology

Heterogamy

heterogamy

[‚hed·ə′räg·ə·mē] (biology) Alternation of a true sexual generation with a parthenogenetic generation. Sexual reproduction by fusion of unlike gametes. Also known as anisogamy. (botany) Condition of producing two kinds of flowers.

Heterogamy

(1) A type of sexual process in which two gametes fusing during fertilization are distinguished by their external form. In heterogamy in the narrow sense the gametes of both sexes differ in size but do not differ in form and behavior (for example, the mobile, flagellate gametes of some algae). A large gamete is called a macrogamete (egg cell), a small one is called a microgamete (spermatozoon), and both are called heterogametes or anisogametes. In a broader sense, heterogamy also includes oogamy (a process in all animals, all higher plants, and many lower plants), in which the egg cell and spermatozoon (sperm) differ in size, form, and behavior.

(2) The transmission to offspring by the male individual of genes or their combination that differ from those donated by the female parent (for example, in Oenothera). If both sexes give the identical combination of genes, the process is called homogamy.

(3) The change in functions of male and female flowers or in their position on the plant (as an anomaly).

单词	heterogamy
释义	heterogamy het·er·og·a·my H0175500 (hĕt′ə-rŏg′ə-mē)n.1. Alternation of sexual and parthenogenic generations, as in some aphids.2. See anisogamy.3. The state of having different types of flowers on the same plant, as both pistillate ray florets and staminate disk florets in a flower head.4. Marriage between people who are different from each other, especially in their sociocultural backgrounds. het′er·o·gam′ic (-rō-găm′ĭk) adj. heterogamy (ˌhɛtəˈrɒɡəmɪ) n1. (Biology) a type of sexual reproduction in which the gametes differ in both size and form. Compare isogamy2. (Biology) a condition in which different types of reproduction occur in successive generations of an organism3. (Botany) the presence of both male and female flowers in one inflorescence. Compare homogamy¹ ˌheterˈogamous adj heterogamy 1. the condition of being heterogamous, or reproducing sexually and asexually in alternating generations. 2. the process of indirect pollination. Cf. heterogenesis. — heterogamous, adj.See also: Biology Heterogamy heterogamy [‚hed·ə′räg·ə·mē] (biology) Alternation of a true sexual generation with a parthenogenetic generation. Sexual reproduction by fusion of unlike gametes. Also known as anisogamy. (botany) Condition of producing two kinds of flowers. Heterogamy (1) A type of sexual process in which two gametes fusing during fertilization are distinguished by their external form. In heterogamy in the narrow sense the gametes of both sexes differ in size but do not differ in form and behavior (for example, the mobile, flagellate gametes of some algae). A large gamete is called a macrogamete (egg cell), a small one is called a microgamete (spermatozoon), and both are called heterogametes or anisogametes. In a broader sense, heterogamy also includes oogamy (a process in all animals, all higher plants, and many lower plants), in which the egg cell and spermatozoon (sperm) differ in size, form, and behavior. (2) The transmission to offspring by the male individual of genes or their combination that differ from those donated by the female parent (for example, in Oenothera). If both sexes give the identical combination of genes, the process is called homogamy. (3) The change in functions of male and female flowers or in their position on the plant (as an anomaly). heterogamy heterogamy [het″er-og´ah-me] the conjugation of gametes differing in size and structure to form the zygote from which the new organism develops; this occurs in higher life forms. het·er·og·a·my (het'ĕr-og'ă-mē), 1. Conjugation of unlike gametes. 2. Bearing different types of flowers. 3. Reproduction by indirect methods of pollination. [hetero- + G. gamos, marriage] heterogamy (hĕt′ə-rŏg′ə-mē)n.1. Alternation of sexual and parthenogenic generations, as in some aphids.2. See anisogamy.3. The state of having different types of flowers on the same plant, as both pistillate ray florets and staminate disk florets in a flower head. het′er·o·gam′ic (-rō-găm′ĭk) adj. het·er·og·a·my (het'ĕr-og'ă-mē) 1. Conjugation of unlike gametes. 2. Bearing different types of flowers. 3. Reproduction by indirect methods of pollination. [hetero- + G. gamos, marriage] heterogamy the alternation of forms of sexual reproduction. see HETEROGAMETIC SEX.
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