The following is an excerpt.
Cloned animals are normally considered to be more alike than those that are conceived naturally, since they are copies of one another just like identical twins are.
Our research at the National Veterinary Institute at the Technical University of Denmark, shows that pig clones are often highly varied and also respond differently than non-clones – which goes against the popular belief.
Over the past decade, research groups from all over the world have reported similar trends: they have for instance found that cloned pigs have as much variation in the expression of certain genes as naturally bred pigs.
Read the full article here: Does the perfect clone exist?