Fri, Apr. 29, 2005BusinessweekGenetic mingling mixes human, animal cells The Associated Press /RENO, Nev. By PAUL ELIAS AP Biotechnology Writer RENO, Nev. - On a farm about six miles outside this gambling town, Jason Chamberlain looks over a flock of about 50 smelly sheep, many of them possessing partially human livers, hearts, brains and other organs.