冷冻大鼠的染色体在小鼠体内复活

THE de-extinction company Colossal Biosciences could be about to get leapfrogged. It might be possible to resurrect mammoth chromosomes in living cells, after scientists transferred a chromosome from a rat that has been deep-frozen for more than a year into living mouse cells. They then generated entire mice in which some of their cells contain an added rat chromosome. “Once we have refined the technique, we’ll start testing it on elephant cells,” says Teruhiko Wakayama at Yamanashi University in Japan. “If we succeed in introducing elephant chromosomes into mouse embryonic stem cells, we definitely want to try it with mammoths.” Simply trying to clone mammoths from these cells would never work because there is far too much DNA damage. …