"Genetic modification is inevitable in the cloning process. In fact, premature death and disease outbreaks are common in cloned animals. “Genetic uniformity [leaves] them prone to disease outbreaks or even bioterrorism. With traditional breeding you’re trying to improve the genetics. Cloning freezes it at one moment,” says Rostov. The same is true for in vitro fertilization and artificial insemination".
See Cloned Meat; the Varsity
for this quote and other critical points concerning cloned meat.