Boman et al. Genetics Selection Evolution 2010, 42:4 http://www.gsejournal.org/content/42/1/4 Page 5 of 7 Figure 1 A typical NWS lamb carcass, flanked by two carcasses homozygous for the MSTN mutation c.960delG. Carcass weight, EUROP conformation class and fat class (both on a 15 points scale), from the left; 29.5 kg, 15, 4; 18.9 kg, 8, 5, and 24.8 kg, 15, 3. Photo: Audun Flåtten, Animalia.