NCIt definition : A stretch of repetitive nucleotide sequences (TTAGGG repeats in humans) found at both
ends of each chromatid arm that plays a role in chromosome stability during replication.;
Alternative definition : NCI-GLOSS: The ends of a chromosome. Each time a cell divides, the telomeres lose
a small amount of DNA and become shorter. Over time, the chromosomes become damaged
and the cells die. In cancer cells the telomeres do not get shorter, and may become
longer, as the cells divide.;