When a woman tests positive for a high possibility of breast cancer, should she consider a preemptive mastectomy? Should it be permissible for companies to use genetic testing to determine insurability? When a single genetic marker implicates more than one disease, should the doctor tell the patient all the possible consequences? This program explores these and other perplexing questions raised by genetic testing. Its use—and applications of other genetic research now available or just over the horizon—will continue to be hotly debated while the repercussions test society’s values and beliefs. (1 hour 46 minutes)