Calves Are Cloned From Adult Cells

Two special calves were born--the first clones from cells from an adult cow, scientists said in Tokyo. The unnamed twins were born exactly two years after Dolly, the British sheep that made history by becoming the first clone of an adult animal. They are the second adult-animal clones--after Dolly--and were produced by a similar technique, said Toyokazu Morita, an official of the Ishikawa Prefectural Livestock Research Center. Morita said the new technique will be used to breed better cattle strains. “I think it’s a very important step in the scientific process,” said Caird Rexroad, assistant deputy administrator for the U.S. Department of Agriculture’s research service.