Abstract
The recent proof, by DNA-microsatellite analysis1 and DNA-fingerprinting techniques,2 that Dolly the sheep had indeed been cloned as Wilmut et al. claimed,3 and the report by Wakayama et al.4 of the successful cloning of more than 20 healthy female mice are likely to reactivate discussions of the ethics of cloning humans and to provoke more calls to ban experiments on mammalian cloning altogether. From the standpoint of biologic science, a ban on such laboratory experiments would be a severe setback to research in embryology.5 From the standpoint of moral philosophy, the ethical debate has been so obscured by incorrect assumptions . . .