A. In fruit flies, the genes for scarlet eyes and hairy body are located on the same chromosome. B. Matings between earless sheep and long-eared sheep always result in short-eared offspring. C. Wheat kernels can range from white to red in color, a trait controlled by several genes. D. The human cystic fibrosis gene causes many symptoms, from respiratory distress to digestive problems. E. An individual with both IA and IB alleles has blood group AB.