Acrocentric chromosome
A chromosome (one of the microscopically visible carriers of the genetic material DNA) with its centromere (the “waist” of the chromosome) located quite near one end of the chromosome. The “acro-“ in acrocentric comes from the Greek “akron” meaning “the end.” Humans have 5 pairs of acrocentric chromosomes. Down syndrome (trisomy 21) is due to an extra acrocentric chromosome, namely chromosome 21. A chromosome with a centromere near one end. Down syndrome (trisomy 21) is due to an extra acrocentric chromosome.

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a chromosome with the centromere near one end. In humans such chromosomes have satellited short arms that carry hundreds of copies of genes for ribosomal RNA.

Medical dictionary. 2011.

Look at other dictionaries:

  • acrocentric chromosome — acrocentric chromosome. См. головчатая 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.

  • acrocentric chromosome — noun a chromosome with the centromere near one end so that one chromosomal arm is short and one is long • Hypernyms: ↑chromosome …   Useful english dictionary

  • acrocentric — adj. 1. having a subterminal centromere an acrocentric chromosome [WordNet 1.5] …   The Collaborative International Dictionary of English

  • Chromosome, acrocentric — A chromosome (one of the microscopically visible carriers of the genetic material DNA) with its centromere (the “waist” of the chromosome) located quite near one end of the chromosome. The “acro “ in acrocentric comes from the Greek “akron”… …   Medical dictionary

  • acrocentric — adjective having a subterminal centromere an acrocentric chromosome • Pertains to noun: ↑centromere …   Useful english dictionary

  • 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

  • acrocentric — Having the centromere close to one end; said of normal chromosomes 13–15 and 21–22. [acro + G. kentron, center] * * * ac·ro·cen·tric .ak rō sen trik adj having the centromere situated so that one chromosomal arm is much shorter than the other… …   Medical dictionary

  • acrocentric — n. a chromosome in which the centromere is situated at or very near one end. Derivatives: acrocentric adj …   The new mediacal dictionary

  • acrocentric — /ak reuh sen trik/, adj. Genetics. of or pertaining to any chromosome or chromatid whose centromere is closer to one end than to the other, creating two unequal chromosome arms. Cf. acentric (def. 2), metacentric (def. 2), telocentric. [1940 45;… …   Universalium

  • acrocentric — 1. adjective Having the centromere very near to one end, and thus having a long arm, and a very short arm. 2. noun A chromosome that has the centromere very near to one end, and thus has a long arm, and a very short …   Wiktionary

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