micronucleus

micronucleus
1. A small nucleus in a large cell, or the smaller nuclei in cells that have two or more such structures. 2. The smaller of the two nuclei in ciliates dividing mitotically and bearing specific inheritable material. SYN: gametic nucleus, germ nucleus, gonad nucleus, karyogonad, reproductive nucleus. SEE ALSO: macronucleus (2).

* * *

mi·cro·nu·cle·us .mī-krō-'n(y)ü-klē-əs n a minute nucleus specif one regarded as primarily concerned with reproductive and genetic functions in most ciliated protozoans compare MACRONUCLEUS

* * *

mi·cro·nu·cle·us (mi″kro-nooґkle-əs) [micro- + nucleus] in ciliate protozoa, the transcriptively inert, diploid nucleus, much smaller than the macronucleus, that is involved in reproduction.

Medical dictionary. 2011.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • micronucléus — [ mikronykleys ] n. m. • 1888; de micro et nucléus ♦ Biol. Le plus petit des deux types de noyaux des cellules des protozoaires ciliés, associé aux fonctions génétiques. On dit aussi MICRONOYAU . ● micronucleus nom masculin Le plus petit des deux …   Encyclopédie Universelle

  • micronucleus — micronucleus. См. микронуклеус. (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.

  • micronucleus — [mī΄krō no͞o′klē əs, mī΄krōnyo͞o′klē əs] n. the smaller of two types of nuclei present in the cells of ciliated protozoans, associated primarily with reproduction and genetics micronuclear adj …   English World dictionary

  • Micronucleus — A the micronucleus is the smaller nucleus in ciliate protozoans, such as the paramecium. In fission it divides by mitosis, and in conjugation furnishes the pairing of gamete nuclei, by whose reciprocal fusion a zygote nucleus is formed, which… …   Wikipedia

  • micronucleus — The smaller nucleus in ciliate protozoans, fully active in inheritance and passed after meiosis to conjugating pairs. Gives rise to the macronucleus or macronuclei. Genes in the micronucleus are not actively transcribed …   Dictionary of molecular biology

  • micronucleus — mikrobranduolys statusas T sritis augalininkystė apibrėžtis Darinys, kurį sudaro atskiros chromosomos ar bivalentos, apgaubtos apvalkalu, ir kuris mitozės ar mejozės metu lieka citoplazmoje. atitikmenys: angl. micronucleus rus. микроядро …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

  • micronucleus — mikrobranduolys statusas T sritis augalininkystė apibrėžtis Pažeista chromosoma, aptinkama citocheminiais metodais. atitikmenys: angl. micronucleus rus. микроядро …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

  • micronucleus test — micronucleus test. См. микроядерный тест. (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.

  • Micronucleus test — A micronucleus test is a test used in toxicological screening for potential genotoxic compounds. There are two major versions of this test, one in vivo and the other In vitro. The in vivo test normally uses mouse bone marrow or mouse peripheral… …   Wikipedia

  • micronucleus — noun Etymology: New Latin Date: 1887 a minute nucleus; specifically one that is primarily concerned with reproductive and genetic functions in most ciliated protozoans …   New Collegiate Dictionary

  • micronucleus — (mi kro nu kle us) The smaller of the two nuclei in ciliate protozoa. Micronuclei are diploid and involved only in genetic recombination and the regeneration of macronuclei …   Dictionary of microbiology

Share the article and excerpts

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