Dictionary of Human Evolution and Biology

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Chromosome Banding Designation

Speciesspecific convention for the identification of banded chromosomes. In humans, each homologous pair of chromosomes is assigned a sequential number (HSA 1, HSA 2, etc.), and the bands on the short (p arm) and long (q arm) arms are each numbered from the centromere (pcen) to the terminus (pter) at the telomere. The numbering scheme is hierarchical, with major portions (1, 2, etc.) further subdivided into one or two more tiers (e.g. 1q24.2). This nonsequential scheme allows for additional band assignments as banding techniques evolve.

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