In human cells, telomeres are usually lengths of single-stranded DNA containing several thousand repeats of a simple TTAGGG sequence.These guanine-rich sequences may stabilize chromosome ends by forming structures of stacked sets of four-base units, rather than the usual base pairs found in other DNA molecules.. 
TaTunde Vincent John Martinst.Ẹkùndayọ̀ Kuṣimo sórino di looya ni 1927t 🙂 