Figure 2.
Models. The yellow alleles are drawn only approximately to scale. Symbols are used as in Fig. 1. (A) Transvection involving trans-acting y1#8 enhancers and/or cis-acting y2 enhancers. (B) Transvection involving trans action of the y1#8 wing and body enhancers. (C) Transvection involving trans action of the y3c3 wing enhancer. (D) The y2 body enhancer bypassing the insulator and acting on the y2 promoter. Wing complementation (*) may involve the y3c3 wing enhancer acting in trans and/or the y2 wing enhancer acting in cis.