Evidence supporting the genetic programming theories of aging comes from research showing that when human cells are permitted to divide in the laboratory,they can do so successfully only around ____ times.

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The number of times human cells can divide in the laboratory is around 50, which supports the genetic programming theories of aging. This limit is known as the Hayflick limit, named after the scientist who discovered it. This limit is thought to be due to the shortening of telomeres, which are the protective caps on the ends of chromosomes. As cells divide, their telomeres shorten, and eventually, the cells enter a state of senescence or programmed death. This suggests that aging is genetically determined to a certain extent.

Evidence Supporting the Genetic Programming Theories of Aging Comes from Research