Mary Jo Iozzio is professor of theology and philosophy at Barry University in Miami Shores, Fla. She edited Considering Religious Traditions in Bioethics: Christian and Jewish Voices (University of Scranton Press, 2000).

Timothy Mark Renick is associate professor of philosophy at Georgia State University in Atlanta. He wrote the article “A Cabbit in Sheep’s Clothing: Exploring the Sources of Our Moral Disquiet About Cloning” for the journal Annual of the Society of Christian Ethics.

John C. Fletcher is a professor emeritus for the Center for Biomedical Ethics at the University of Virginia in Charlottesville. He wrote the entries “The Stem Cell Debate in Historical Context” and “The NBAC’s (National Bioethics Advisory Commission) Arguments on Embryo Research: Strengths and Weaknesses” for The Human Embryonic Stem Cell Debate (MIT Press, 2001).

Daniel B. McGee is a professor of ethics at Baylor University in Waco, Texas. He wrote the article “A Consistent Center for Bioethics” for the Theological Educator: A Journal of Theology and Ministry.

Wendy Baldwin is vice president for research at the University of Kentucky in Louisville. She has argued before the Kentucky state legislature in favor of embryonic stem cell research.

Brent Waters is a professor of Christian social ethics for Garrett-Evangelical Theological Seminary in Evanston, Ill. He co-edited God and the Embryo: Religious Voices on Stem Cells and Cloning. He studies Christian ethics and can discuss their relationship to Christian political thought.

James M. Childs Jr. is a professor at Trinity Lutheran Seminary in Columbus, Ohio. He wrote the 1991 article “Genetics, ethics and the human future” for the Trinity Seminary.

Dena S. Davis is a professor at the Cleveland-Marshall College of Law at Cleveland State University in Cleveland. She wrote the article “Informed Consent for Stem Cell Research in the Public Sector” for the Journal of the American Medical Women’s Association.

Jefferson McMahan is a professor of philosophy at Rutgers University. He wrote the article “Cloning, Killing and Identity” for the Journal of Medical Ethics.