Chromatin Chro"ma*tin, n. (Biol.) The deeply staining substance of the nucleus and chromosomes of eukaryotic cells, composed of DNA and basic proteins (such as histones), the DNA of which comprises the predominant physical basis of inheritance. It was, at the beginning of the 20th century, supposed to be the same substance as was then termed {idioplasm} or {germ plasm}. In most eukaryotic cells, there is also DNA in certain plasmids, such as mitochondria, or (in plant cells) chloroplasts; but with the exception of these cytoplasmic genetic factors, the nuclear DNA of the chromatin is believed to contain all the genetic information required to code for the development of an adult organism. In the interphase nucleus the chromosomes are dispersed, but during cell division or meiosis they are condensed into the individually recognizable chromosomes. The set of chromosomes, or a photographic representation of the full set of chromosomes of a cell (often ordered for presentation) is called a karyotype. [Webster 1913 Suppl.]

The Collaborative International Dictionary of English. 2000.

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  • Idioplasm — Id i*o*plasm, n. (Biol.) Same as {Idioplasma}. [1913 Webster] …   The Collaborative International Dictionary of English

  • idioplasm — idioplasm. См. идиоплазма. (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.

  • idioplasm — [id′ē ō΄plaz΄əm] n. [ IDIO + PLASM] the chromatin in a cell regarded as the part of the cell transmitting hereditary qualities: cf. TROPHOPLASM …   English World dictionary

  • idioplasm — gemalinė plazma statusas T sritis augalininkystė apibrėžtis Paveldimumo medžiaga, susitelkusi ląstelių branduoliuose ir perduodama gemalinių ląstelių kitoms kartoms. atitikmenys: angl. germ plasm; idioplasm rus. зародышевая плазма; идиоплазма… …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

  • idioplasm — n. [Gr. idios, personal; plasma, formed or molded] All of the hereditary determinants of an organism, both nuclear and cytoplasmic; germ plasm; idiotype; see genotype …   Dictionary of invertebrate zoology

  • idioplasm — idioplasmic, idioplasmatic /id ee oh plaz mat ik/, adj. /id ee euh plaz euhm/, n. Biol. See germ plasm. [1885 90; IDIO + PLASM] * * * …   Universalium

  • idioplasm — id·io·plasm id ē ə .plaz əm n the part of the protoplasm that functions specif. in hereditary transmission: GERM PLASM (2) …   Medical dictionary

  • idioplasm — id·i·o·plasm || ɪdɪəplæzm n. part of the cell protoplasm which contains genes and chromosomes (Biology) …   English contemporary dictionary

  • idioplasm — id·io·plasm …   English syllables

  • idioplasm — /ˈɪdioʊplæzəm/ (say ideeohplazuhm) noun Rare → germ plasm. {term coined by Carl von Nägeli, Swiss botanist, in a book published in 1884} –idioplasmic /ˌɪdioʊˈplæzmɪk/ (say .ideeoh plazmik), idioplasmatic /ˌɪdioʊplæzˈmætɪk/ (say .ideeohplaz matik) …   Australian English dictionary