Cloning, therefore, could undermine basic elements of a loving, nurturing family, such as the acceptance of each child as a unique individual. Cloning might have society-wide effects, as well. Ethicists have voiced concerns that cloning, combined with various techniques of genetic engineering, could lead to efforts to selectively breed children who are healthier, more intelligent, or even designed for warfare or slavery. In favor of human cloning Scientists and medical ethicists who argue in favor of human cloning claim that much of the public's concern is based on misconceptions. They note that, although many people believe that cloning would produce an instant carbon copy of an adult person, cloning would, in reality, produce what amounts to a delayed identical twin, several years or even decades younger than the person who donated the cell from which the clone was produced.
Identical twins are genetic carbon copies, but they are separate individuals.
They often look different because of different preferences in clothing and hairstyle. They may have different moral values, academic achievements, occupations, and tastes in music. Another misconception that scientists suggest clouds the issue of human cloning is the question of how genes influence an individual's development. Human beings do not inherit a fixed, unchangeable genetic blueprint from their parents. Two people can inherit the same set of genes and turn out very differently, because environmental factors often determine how genes are expressed.