Milestones in Cloning (Cont.)
l2001- Scientists at Advanced Cell Technology clone a
gaur, an endangered ox-like species.
The animal appears healthy when it is delivered by its surrogate mother, a cow, but dies two days later from a bacterial
infection.
l2002- The first
cloned pet, a cat named cc, short for copy cat, is produced by scientists at Texas A&M.
l2003- Scientists
finish mapping the human genome, two years ahead of schedule. By replacing DNA from human body cells,
Advanced Cell Technology says, it has
developed a human embryo that progressed to 16 cells.
l2004- South Korean
scientists say they have cloned a human embryo and extracted stem cells from it.