polytene chromosome

polytene chromosome
a giant cablelike chromosome composed of numerous identical chromatids arranged in parallel, resulting from many rounds of DNA replication in the absence of chromatid separation and occurring especially in the salivary glands of some insects. Localized hypercoiling of the chromatids produces a characteristic banding pattern, perpendicular to the main axis, that has been used as a cytologic landmark.

Medical dictionary. 2011.

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Look at other dictionaries:

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

  • polytene chromosome — polytene chromosome. См. политенная хромосома. (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.

  • polytene chromosome — /pol ee teen /, Genetics. a giant, cross banded chromosome that results from multiple replication of its genetic material with the duplicated chromatin strands remaining closely associated. [1970 75; POLY + TENE] * * * …   Universalium

  • polytene chromosome — /pol ee teen /, Genetics. a giant, cross banded chromosome that results from multiple replication of its genetic material with the duplicated chromatin strands remaining closely associated. [1970 75; POLY + TENE] …   Useful english dictionary

  • polytene chromosome — Giant chromosomes produced by interphase replication without division, and consisting of many identical chromatids arranged side by side …   Glossary of Biotechnology

  • Chromosome Polytène — grossi 5000 fois …   Wikipédia en Français

  • Chromosome polytene — Chromosome polytène Chromosome polytène grossi 5000 fois …   Wikipédia en Français

  • Chromosome polyténe — Chromosome polytène Chromosome polytène grossi 5000 fois …   Wikipédia en Français

  • Polytène — Chromosome polytène Chromosome polytène grossi 5000 fois …   Wikipédia en Français

  • Polyténe — Chromosome polytène Chromosome polytène grossi 5000 fois …   Wikipédia en Français

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