weed out

weed out

Preview: Breeding out disease

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Genetic testing and in vitro fertilization are making it possible for scientists to weed out breast cancer, muscular dystrophy, hemophilia and other dangerous and often deadly diseases from the gene pool. Norah O’Donnell reports on this emerging and sometimes controversial science on Sunday, Oct. 26 at 7:30 p.m. ET and 7 p.m. PT.