Figure 3.

Evolutionary relationship of Ma-bcd, Ma-zen, and Hox-C genes of Drosophila, as deduced by neighbor-joining analysis. Numbers refer to bootstrap percentages obtained from neighbor-joining (first value) and maximum parsimony analysis. Trees including the more diverged bicoid and zerknüllt genes of Drosophila remain unresolved with respect to the monophyletic cluster of bicoid and zerknüllt orthologs (bootstrap value below 50%; data not shown). For abbreviations, see legend to Figs. 1 and 2.