Featured below is composite series of images of a Drosophila (fruit fly) wing imaginal disc. Different color combinations of this double-labeled sample reveal the location of wingless genetic mutants: achaete genes in red/yellow, yellow/white, purple/white, or blue/white and apterous genes in green, blue, green, and red, respectively.

Fruit Fly Imaginal Disc: Wing Specimen: Drosophila Imaginal Disc Technique: Fluorescence Composite

In fruit flies, imaginal discs are the developmental tissues from which many adult structures, including eyes, wings, and halteres, are formed.