Satellite chromosome

Satellite chromosome

The Satellite Chromosome is the chromosome which has a bulge on the telomeric end and contains the enzyme "Sine Acido Nucleinico". Also referred to as SAT Chromosome, it plays a vital role in the formation of the nucleolous after division is completed.

It shows repetitive sequences of genes

Besides centromere, secondary constriction can also be observed in some chromosomes, which if present in the distal region of the arm, would pinch off a small fragment called Satellite.

The satellite remains attached to the rest of the body of chromosomes by a thread of chromatin. The secondary constrictions are always constant in their positions and hence can be used as markers. The chromosomes having a satellite are marker chromosomes and are also called SAT chromosomes.

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Look at other dictionaries:

  • satellite chromosome — Genetics. See B chromosome. * * * …   Universalium

  • satellite chromosome — Genetics. See B chromosome …   Useful english dictionary

  • Satellite DNA — consists of very large arrays of tandemly repeating, non coding DNA. Satellite DNA is the main component of functional centromeres, and form the main structural constituent of heterochromatin.[1][2] The name satellite DNA refers to how… …   Wikipedia

  • satellite — [ satelit ] n. m. • satelite v. 1265; lat. satelles, satellitis « garde du corps » I ♦ 1 ♦ (1665) Corps céleste gravitant sur une orbite elliptique autour d une planète. La Lune est le satellite de la Terre. Les satellites de Jupiter. Satellite… …   Encyclopédie Universelle

  • satellite Y chromosome — satellite Y chromosome. См. Y хромосома со спутником. (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.

  • satellite —   , satellite body.   Minute chromosome portion separated from the main body by the centromere or primary constriction …   Expanded glossary of Cycad terms

  • 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

  • satellite — 1. A minor structure accompanying a more important or larger one; e.g., a vein accompanying an artery, or a small or secondary lesion adjacent to a larger one. 2. The posterior member of a pair of gregarine gamonts in syzygy, several of which may …   Medical dictionary

  • Satellite DNA — DNA that contains many tandem (not inverted) repeats of a short basic repeating unit. Satellite DNA is located at very specific spots in the genome (on chromosomes 1, 9, 16 and the Y chromosome, the tiny short arms of chromosomes 13 15 and 21 and …   Medical dictionary

  • B chromosome — Genetics. a type of densely staining chromosome of uncertain biological function, found in many plant and animal species. Also called accessory chromosome, satellite chromosome. [1975 80] * * * …   Universalium

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