The suggested mechanism behind the genetic limits theory of aging comes from the discovery that chromosomes in many human body cells (and those of some other species, too) have, at their tips, lengths of repeating DNA called _____________.

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The lengths of repeating DNA at the tips of chromosomes are called telomeres. The shortening of telomeres with each cell division is one proposed mechanism for the genetic limits theory of aging.

The Suggested Mechanism Behind the Genetic Limits Theory of Aging