Reduced pesticide use suggests that Bt crops would be generally beneficial to in-crop biodiversity in comparison with conventional crops that receive regular, broad-spectrum pesticide applications, although these benefits would be reduced if supplemental insecticide applications were required (GM Science Review Panel). At present, the production of transgenic and cloned animals is extremely inefficient, with high mortality during early embryonic development and success rates of only 1-3 percent. Of the transgenic animals born, the inserted genes may not function as expected, often resulting in anatomical, physiological and behavioural abnormalities (NRC, 2002).