Dolly, a sheep, was cloned from the nucleus of a mammary cell. In the past few year mice, cats and pigs have joined sheep in a growing collection of cloned mammals. Despite the sheep in a growing collection of cloned mammals. Despite the growing numbers of cloned animals there are still many problems. Read the Bioethics: Choices for the Future box on page 54 of the text and discuss the following question:
What do you think are some of the technical challenges and ethical concerns involved in cloning?