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a chromosome with a terminal centromere; such chromosomes in humans are unstable and arise by misdivision or breakage near the centromere and are usually eliminated within a few cell divisions.
Farlex Partner Medical Dictionary © Farlex 2012
telocentric chromosomea chromosome in which the CENTROMERE is terminal (situated at one end), so that there is effectively only one arm.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005