16 September 1999
Calf cloned from an adult bull

SCIENTISTS at the University of Texas have cloned a calf from a 21-year-old adult bull, thought to be oldest bull ever used in such an experiment.

The bull, called Chance, died shortly before the scientists used its DNA to produce the calf.

Scientists are interested in the calf because of the advanced age of the cells used to produce it.

One concern is that clones may age prematurely because their DNA has some of the characteristics of the older cells that were used to generate them.

  • Financial Times 16/09/99 page 14 (Technology Worth Watching)