An individual's DNA plays a role in the aging process. Aging begins even before birth, as soon as cells start to die and need to be replaced. On the ends of each chromosome are repetitive sequences of DNA, telomeres, that protect the chromosome from joining with other chromosomes, and have several key roles.
Aging is initiated by cellular deterioration and replacement, which begins from birth. Telomeres, located at the ends of chromosomes, play a crucial role in protecting chromosomes from fusing with other chromosomes and contribute to the aging process.