lampbrush chromosome

Large diplotene chromosomes present in oocyte nuclei, and particularly conspicuous in amphibians. These chromosomes have extended regions called loops, which are active sites of transcription.

Glossary of Biotechnology for Food and Agriculture . 2015.

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  • lampbrush chromosome — lampbrush chromosome. См. хромосомы типа ламповых щеток. (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.

  • Lampbrush chromosome — A Lampbrush chromosome (first seen by Flemming in 1882) is a large chromosome (largest) found especially in the oocytes (immature eggs) of most animals, except mammals. Lampbrush chromosomes occur during the diplotene stage of meiosis I.… …   Wikipedia

  • lampbrush chromosome — ˈ ̷ ̷ˌ ̷ ̷ noun Etymology: translation of German lampenbürstenchromosom : a greatly enlarged pachytene chromosome having apparently filamentous granular loops extending from the chromomeres that is especially characteristic of certain animal… …   Useful english dictionary

  • lampbrush chromosome — lamp·brush chromosome .lamp .brəsh n a greatly enlarged diplotene chromosome that has apparently filamentous granular loops extending from the chromomeres and is characteristic of some animal oocytes * * * a giant chromosome with hundreds of… …   Medical dictionary

  • lampbrush chromosome — noun Date: 1911 a greatly enlarged diplotene chromosome that has apparently filamentous granular loops extending from the chromomeres and is characteristic of some animal oocytes …   New Collegiate Dictionary

  • Chromosome — For a non technical introduction to the topic, see Introduction to genetics. Diagram of a replicated and condensed metaphase eukaryotic chromosome. (1) Chromatid – one of the two identical parts of the chromosome after S phase. (2)… …   Wikipedia

  • Chromosome — A visible carrier of the genetic information. The 3 billion bp (base pairs) in the human genome are organized into 24 distinct, physically separate microscopic units called chromosomes. All genes are arranged linearly along the chromosomes. The… …   Medical dictionary

  • Polytene chromosome — Polytene chromosomes in a Chironomus salivary gland cell …   Wikipedia

  • giant chromosome — 1. polytene c. 2. lampbrush c …   Medical dictionary

  • Cromosoma — Vista general de las células en un ápice de raíz de cebolla (Allium cepa), observado con 800 aumentos. (a) Célula sin dividirse, obsérvese la red de cromatina …   Wikipedia Español

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