Figure 1.

Phylogenetic relationship among haplotypes. The arrows indicate the direction of the mutations (hollow letters). The phylogeny includes all equally parsimonious topologies by allowing multifurcation. All sites are congruent to each other, indicating the lack of recombination and recurrent mutation events within the 565-bp fragment encompassing 12 polymorphic sites in hominoids. Chimpanzee and gorilla sequences were used to determine the root of the phylogeny as well as the ancestral state of the sequences.