Medical dictionary. 2011.
translocation — 1. Transposition of two segments between nonhomologous chromosomes as a result of abnormal breakage and refusion of reciprocal segments. 2. Transport of a metabolite across a biomembrane. [trans + L. location, placement, fr. loco, to place]… … Medical dictionary
Translocation, Robertsonian — A relatively very common and medically significant type of chromosome rearrangement that is formed by fusion of the whole long arms of two acrocentric chromosomes (chromosomes with the centromere near the very end). One in about 900 babies is… … Medical dictionary
Chromosomal translocation — of the 4th and 20th chromosome. In genetics, a chromosome translocation is a chromosome abnormality caused by rearrangement of parts between nonhomologous chromosomes. A gene fusion may be created when the translocation joins two otherwise… … Wikipedia
Robertsonian translocation — A common and significant type of chromosome rearrangement that is formed by fusion of the whole long arms of two acrocentric chromosomes (chromosomes with the centromere near the very end). One in about 900 babies is born with a Robertsonian… … Medical dictionary
Robertsonian translocation — is a common form of chromosomal rearrangement that occurs in the five acrocentric human chromosome pairs, namely 13, 14, 15, 21, and 22. They are named after the American insect geneticist W. R. B. Robertson, who first described a Robertsonian… … Wikipedia
Centric-fusion translocation — A type of chromosome rearrangement, also called a Robertsonian translocation, in which there is fusion of an entire long arm of one acrocentric chromosome with a similarly intact long arm of another acrocentric chromosome. The short arms of the… … Medical dictionary
Whole-arm translocation — A type of chromosome rearrangement, also called a Robertsonian translocation, in which there is fusion of an entire long arm of one acrocentric chromosome with a similarly intact long arm of another acrocentric chromosome. The short arms of the… … Medical dictionary
Genetic origins of Down syndrome — Down syndrome is a chromosomal abnormality characterized by the presence of an extra copy of genetic material on the 21st chromosome, either in whole (trisomy 21) or part (such as due to translocations). The effects of the extra copy varies… … Wikipedia
genetic disease, human — Introduction any of the diseases and disorders that are caused by mutations in one or more genes (gene). With the increasing ability to control infectious and nutritional diseases in developed countries, there has come the realization … Universalium
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
