The clone will not be a similar copy as he or she will grow up in different surroundings from the clone and may encounter different opportunities and experiences. Although mostly positive, cloning also faces some setbacks in terms of ethics and human health. Though cell division and DNA replication is a vital part of survival, there are many steps involved and mutations can occur with permanent change in an organism's and their offspring's DNA.[8] Some mutations can be good as they result in random evolution periods in which may be good for the species, but most mutations are bad as they can change the genotypes of offspring, which can result in changes that harm the species.