Cloning is a public issue because it can be abused. The same techniques which allow researchers to grow a new pancreas from a patient's DNA for transplantation can theoretically be used to grow an entire new person who is genetically identical to the patient. In addition, before growth has begun, in theory the DNA can be modified so that the clone is mostly identical but has certain characteristics adjusted (improving muscle growth or height or removing a genetic disease). This is morally very scary territory and the ethical issues are literally larger than life. What if people started cloning children who died? What if they cloned their pets? What if people who were dissatisfied with their lives or their age or health chose to clone themselves and start life over?
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