Drosophila, the genes for eye color, wing shape, and wing length are located on chromosome II. Purple eyes (pr), arc bent wings (a), and vestigial wings (vg) are the mutant forms of the wild type traits red eyes, straight wings, and long wings, respectively. You've discovered some data in your genetics laboratory which indicates that the distance between vg and pr is 12.5 m. u., the distance between a and pr is 44.7 m. u., and the distance between a and vg is 32.2 m. u. Required:
From this information, deduce the order of these genes on chromosome II and identify which gene is in the middle.