an embryo contains only the donor's gene. At the other end of spectrum are some experts who are of the opinion that the embryo does not require any particular moral consideration. It helps homosexual and sterile couples to have biological offspring. Embryonic stem cells can be cloned to produce tissues or organs to replace or repair the damaged ones. On the flip side, cloning presents us with certain issues like the kind of life a cloned individual will lead. The procedure involves removing the nucleus of a somatic cell and inserting it into an enucleated or unfertilized egg cell. New issues are bound to crop up with advances in this field, and only time can decide its fate. A cloned child having multiple donors might complicate parental right issues as well as inheritance and marital eligibility issues.
A third theoretical type of cloning is also explained in texts, known as replacement cloning. In 1997, Dolly the sheep became the first mammal to be successfully cloned. Zeb, Doric and egocentric, lights his bombs and eats spoiled. Some advocate human cloning as ethically unacceptable because it is seen as a threat to the entire human evolution. Even when genetically identical twins are born, their embryo splits spontaneously or randomly to give a new unique genetic combination.