1997, scientists announced the creation of Dolly, the world's first
cloned sheep. One year later, the same scientists created Polly.
Polly's claim to fame - she has a human gene in every one of her
cells. Polly was genetically engineered to express human blood clotting
factor IX in her milk. This protein is important to hemophiliacs,
whose bodies do not produce the protein because of a genetic mutation.
Polly was one of the first important pharming experiments - efforts
to genetically engineer animals and plants to produce medically
Source: Arizona State University. a.u. "Transgenic Animals: Chapter
19." (Online.) http://photoscience.la.asu.edu/photosyn/courses/BIO_343/lecture/transan.html September 2002.