Figure 1
From: Bias in phylogenetic tree reconciliation methods: implications for vertebrate genome evolution
Two examples of tree reconciliation. In both (a) and (b) the leftmost tree represents the gene tree, the middle tree the reconciled gene tree showing the duplications and losses, and the rightmost tree shows the species tree with gains (duplications) and losses mapped onto the appropriate branches. The reconciled gene trees represent what the gene tree would look like including lost genes (grey branches).