...generally comprises 10 homeobox genes arranged in a specific order reflecting their evolutionary origin by tandem gene
duplication: lab, pb, zen, Dfd, Scr, Antp, ftz, Ubx, abd-A, and Abd-B. The cluster may be split, as in many Drosophila species (Duboule 2007; Negre and Ruiz 2007), individual genes may...