Why would you give a cactus human hair? Or grow wings for pigs? And as for redesigning the butterfly... Artists are appropriating biotechnology for their own ends.
New Scientist tracked down three of them working in this wild new place: Laura Cinti, Oron Catts and Marta de Menezes.
http://www.newscientist.com/article/mg18124365.400-art-but-not-as-we-know-it.html