Figure 3: Orthologous genes shared between insect and human genomes.
From: The genome of the model beetle and pest Tribolium castaneum
The Venn diagram shows the number of orthologous groups of genes shared between the insect and human genomes. In addition to the majority of Urbilateria (last common ancestor of the Bilateria) genes shared by all the organisms, there are hundreds of genes that have been lost in some lineages (for example, only retained between human and Tribolium or human and honeybee, but lost in Diptera). Diptera is represented here by Anopheles gambiae, Aedes aegypti and Drosophila melanogaster (with numbers considering only D. melanogaster shown in parentheses).
