Ring chromosome

A structurally abnormal chromosome in which the end of each chromosome arm has been lost and the broken arms have been reunited in ring formation. A ring chromosome is denoted by the symbol r.

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(r) a chromosome in which both ends have been lost (deletion) and the two broken ends have reunited to form a ring. See illustration at aberration.

Medical dictionary. 2011.

Look at other dictionaries:

  • ring chromosome — ring chromosome. См. кольцевая 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.

  • Ring chromosome — A ring chromosome is a chromosome whose arms have fused together to form a ring. A ring chromosome is denoted by the symbol r. Ring chromosomes may form in cells following genetic damage by mutagens like radiation, they may also arise… …   Wikipedia

  • Ring chromosome 20 syndrome — Ring chromosome 20, ring shaped chromosome 20 or r(20) syndrome is a rare human chromosome abnormality where the two arms of chromosome 20 fuse to form a ring chromosome. The syndrome is associated with epileptic seizures, behaviour disorders and …   Wikipedia

  • Ring chromosome 18 syndrome — Infobox Disease Name = PAGENAME Caption = DiseasesDB = 32338 ICD10 = ICD9 = ICDO = OMIM = MedlinePlus = eMedicineSubj = eMedicineTopic = MeshID = Ring chromosome 18 syndrome is a rare condition in which one or both ends of chromosome 18 have been …   Wikipedia

  • Chromosome 7 (human) — Chromosome 7 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 7 spans more than 158 million base pairs (the building material of DNA) and represents between 5 and 5.5 percent of the… …   Wikipedia

  • Chromosome 21 (human) — Chromosome 21 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. The trisomy of the 21st chromosome causes Down Syndrome. Chromosome 21 is the smallest human chromosome, 47 million nucleotides… …   Wikipedia

  • Chromosome 5 (human) — Chromosome 5 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 5 spans about 181 million base pairs (the building blocks of DNA) and represents almost 6% of the total DNA in cells.… …   Wikipedia

  • Chromosome 22 (human) — Chromosome 22 is one of the 23 pairs of chromosomes in human cells. Humans normally have two copies of Chromosome 22 in each cell. Chromosome 22 is the second smallest human chromosome, spanning about 49 million DNA base pairs and representing… …   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

  • Chromosome abnormality — The three major single chromosome mutations; deletion (1), duplication (2) and inversion (3) …   Wikipedia

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