Figure 2 .

D. serrata and D. melanogaster polytene chromosomes showing mapped location of genes via in situ hybridization arranged in order of Mueller elements (Elements D–F). The D. melanogaster map is from Lefevre (1976), and the D. serrata map has been adapted from Mavragani-Tsipidou and Scouras (1990). Gene locations are indicated by arrows. Genes in red were mapped by Drosopoulou and Scouras (1995), Drosopoulou et al. (1996, 1997, 2002), Pardali et al. (1996), Drosopoulou and Scouras (1995, 1998) and are included for completeness. These genes were originally mapped to regions only. We have sometimes been able to give them a more defined position through examination of the original photographs. Genes in blue are SNP sequences also included on the linkage map. Thin red lines indicate inversions found along the eastern Australia D. serrata cline (Stocker et al. 2004). Black lines over D. serrata chromosomes and arrowheads beneath the chromosomes were designated as inverted repeat regions and weak points respectively by Mavragani-Tsipidou and Scouras (1990).