CREATIVE SOLUTION. “Eukaryotic cells have evolved a novel solution to the end replication problem in which the specialized chromosome end structures, or telomeres, contain repetitive sequences, some of which are lost at each round of replication. The loss of these sequences, which lack the information contained in downstream genes, acts as a buffer protecting those genes from loss during each round of DNA replication.”
http://protein.bio.msu.ru/biokhimiya/contents/v62/full/62111380.html