User blog comment:Ravager134K/DNA confusion/@comment-2015332-20100511221342

"Pure" means that they have only Chimeran DNA. It does not mean it can become unpure. The Chimera themselves are like parasites, feeding on entire planets. Would it not make sense that the DNA of a pure version of one of these parasites be looking for a host as well? Their genetic makeup could mainly be the need for a host.