Telomere is the DNA sequence that cap chromosomes and it become shorter each time a cell divides.
Telomeres are DNA sequence that cap chromosomes and are made up repetitive sequences of non-coding DNA which help to protect the chromosome from been damaged. Anytime, a cell divides, the telomeres become shorter and continue to become so short that the cell can no longer divide.
Therefore, DNA sequence that cap chromosomes is called Telomere.
Learn more about telomeres here.
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