Final answer:
Telomeres are short sequences at the end of chromosomes that prevent loss of genetic information.
Step-by-step explanation:
Telomeres are short sequences at the end of chromosomes that prevent loss of genetic information. They consist of repetitive nucleotide sequences, such as TTAGGG in humans. The main function of telomeres is to protect the integrity of chromosomes during cell division and prevent the loss of essential genetic material. Each time a cell divides, the telomeres shorten until they reach a critical length, which triggers cell senescence or apoptosis.
Learn more about Telomeres and their role in preserving genetic information