Wings, Horns, and Butterfly Eyespots: How Do Complex Traits Evolve?
Figure 1
Similar Gene Expression in Various Non-Homologous Structures
The transcription factor Distal-less (Dll) is expressed (A) in the horn primordium of the African dung beetle, Onthophagus nigriventris(modified from [9]); (B) in the eyespot focus of the squinting bush brown butterfly, Bicyclus anynana (modified from [40]); and (C) in the leg imaginal disc of the fruit fly, D. melanogaster (modified from [41]). The transcription factor Spalt (Sal) is expressed (D) in the antenna imaginal disc of D. melanogaster (modified from [42]); and (E) in the eyespot field of B. anynana pupal wings (modified from [12]).