From carrots to frogs to sheep and finally to humans, the history of cloning is a fascinating study of the interplay between science and popular culture. Imagination and discovery provide mutual impetus in the evolving science and cultural phenomenon of cloning. Its history is a paradigm of science unfiction: What once belonged unequivocally on the pages of science fiction is now emerging in flesh and blood. Writers, movie producers, ethicists, and all manner of social commentators, no less than scientists, have (...) all participated in the creation of the human clone as an idea and as a biological entity. While the clone stands apart as having only one genetic parent, it truly is a brainchild of multifarious origins. (shrink)

Some opponents of reproductive human cloning have argued that, because of its experimental nature, any attempt to create a child by way of cloning would risk serious birth defects or genetic abnormalities and would therefore be immoral. Some versions of this argument appeal to the consent of the person to be conceived in this way. In particular, they assume that if an experimental reproductive technology has not yet been shown to be safe, then, before we use it, we are morally (...) obligated to get either the actual consent or the presumed consent of the person to be conceived. In this article, I attempt to explain the appeal of such consent-based arguments as deriving from a mistaken view of personal identity. I then argue that since this view is false, such arguments are unsound. Finally, I argue that even if reproductive cloning is unsafe, it may still be morally permissible in some circumstances. (shrink)

To clone humans is deliberately to generate two or more individuals who share the same nuclear deoxyribonucleic acid. Using animals, researchers have performed two basic types of cloning that will eventually yield commercial benefits. Embryo twinning involves separating the individual cells of an embryo and allowing each to cleave for later transfer to a uterus. Cloning by nuclear transfer involves removing the nuclei from embryonic cells or fetal or adult somatic cells and fusing those nuclei with enucleated donor egg cells. (...) Although for the purposes of commercial biotechnology these techniques do not raise undue concern when attempted with animals, embryo twinning, embryo nuclear transfer, fetal somatic cell nuclear transfer, and adult somatic cell nuclear transfer all provoke intense ethical discussions when considered for human use. (shrink)

To clone humans is deliberately to generate two or more individuals who share the same nuclear deoxyribonucleic acid. Using animals, researchers have performed two basic types of cloning that will eventually yield commercial benefits. Embryo twinning involves separating the individual cells of an embryo and allowing each to cleave for later transfer to a uterus. Cloning by nuclear transfer involves removing the nuclei from embryonic cells or fetal or adult somatic cells and fusing those nuclei with enucleated donor egg cells. (...) Although for the purposes of commercial biotechnology these techniques do not raise undue concern when attempted with animals, embryo twinning, embryo nuclear transfer, fetal somatic cell nuclear transfer, and adult somatic cell nuclear transfer all provoke intense ethical discussions when considered for human use. (shrink)

In 1993, investigators from George Washington University Medical Center separated the cells of 17 human embryos and produced 48 embryos, an average of three embryos for each original. The method, variously called twinning, cloning, embryo splitting, and blastomere separation, demonstrated that human embryos could be split to create genetically identical entities during conception. When publicized, however, the experiment brought to mind a different view of cloning repeated since the beginning of the new reproductive technologies. In the early 1970s, when research (...) on in vitro fertilization was in its infancy, commentators worried that cloning–defined as the duplication of persons–would be next, leading to a scenario of “boys genetically exactly like the father, girls like the mother, or individuals like some true or false hero of art, science, or sports, or like some demagogue or some saint.”. (shrink)