centromere

centromere
—centromeric /sen'treuh mer"ik, -mear"-/, adj.
/sen"treuh mear'/, n. Cell Biol.
a specialized structure on the chromosome, appearing during cell division as the constricted central region where the two chromatids are held together and form an X shape.
[1920-25; CENTRO- + -MERE]

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Structure in a chromosome that holds together the two chromatids.

It is the point of attachment to the structure that pulls the chromatids to opposite ends of the cell during cell division (see mitosis). During the middle stage of mitosis, the centromere duplicates and the chromatid pair separates, each chromatid becoming a separate chromosome. Thus, when the cell divides, both daughter cells have complete sets of chromosomes.

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Universalium. 2010.

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Look at other dictionaries:

  • Centromere — Centromère Chromosome. (1) Chromatide. Chacune formée d un brin d ADN parental et d un brin d ADN néoformé obtenu après réplication durant la phase S ; (2) Centromère. Le point de contact des deux chromatides, et le point de séparation lors… …   Wikipédia en Français

  • centromère — [ sɑ̃trɔmɛr ] n. m. • 1973; de centro et mère ♦ Biol. Petit granule ne fixant pas les colorants, situé en général au centre du chromosome, auquel le fuseau se fixe lors de la division cellulaire. ● centromère nom masculin Constriction présente… …   Encyclopédie Universelle

  • centromere — n. (Biol.) a specialized condensed region of a chromosomes that appears during mitosis where the chromatids are held together to form an X shape. [WordNet 1.5] …   The Collaborative International Dictionary of English

  • centromere — centromere. См. центромера. (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.

  • centromere — [sen′trō mir΄] n. [ CENTRO + MERE] a small, nonstaining structure, usually near the center of a chromosome to which the spindle fiber attaches during mitosis centromeric [sen′trōmer′ik, sen′trōmir′ik] adj …   English World dictionary

  • Centromere — Chromosomal components: (1) Chromatid (2) Centromere (3) Short arm (4) Long arm A centromere is a region of DNA typically found near the middle of a chromosome where two identical sister chromatids come closest in contact. It is involved in cell… …   Wikipedia

  • Centromère — Chromosome. (1) Chromatide. Chacune formée d un brin d ADN parental et d un brin d ADN néoformé obtenu après réplication durant la phase S ; (2) Centromère. Le point de contact des deux chromatides, et le point de séparation lors de la… …   Wikipédia en Français

  • Centromere — The cinched waist of the chromosome essential for the division and the retention of the chromosome in the cell. The centromere is a uniquely specialized region of the chromosome to which spindle fibers attach during cell division. The human… …   Medical dictionary

  • centromere — The region in eukaryote chromosomes where daughter chromatids are joined together. The kinetochore, to which the spindle chromosomes are attached, lies adjacent to the centromere. The centromeric DNA codes for the kinetochore …   Dictionary of molecular biology

  • centromere — centromera statusas T sritis augalininkystė apibrėžtis Pirminė chromosomos persmauga, prie kurios prisitvirtina achromatinės verpstės siūlai. atitikmenys: angl. centromere; kinetochore rus. кинетохор; центромера …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

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