phys.org
Double trouble at chromosome ends: New study alters our understanding of telomere biology
Half a century ago‚ scientists Jim Watson and Alexey Olovnikov independently realized that there was a problem with how our DNA gets copied. A quirk of linear DNA replication dictated that telomeres that protect the ends of chromosomes should have been growing shorter with each round of replication‚ a phenomenon known as the end-replication problem.