Bullish Hopes for Serial Cloning

Bullish Hopes for Serial Cloning: "A Japanese bull famous for siring more than 350,000 offspring now also holds the distinction of being the first large mammal to have two generations of clones. Researchers created six clones of the bull in 2000, and now they have also cloned one of those six in the first successful 'serial cloning' experiment with a large mammal. In 1998, researchers created six generations of serially cloned mice, but efforts in larger mammals failed until now."Finally we achieved this one after several hundred trials and eventually got two calves," Yang said. "We finally can say it is possible to do serial cloning in other species.""