Cloning remains an unpredictable process. A study by the Whitehead Institute for Biomedical Research shows that fewer than 10 percent of cloned embryos survive to birth. Those that make it are often born oversize and die earlier than normal. The animals listed here represent a sample of the roughly 15 cloned species.
Sheep (“Dolly”)
7/1996
Died of lung
disease at 6 1/2
