Example graph of states across several loci. A pictorial representation showing the relationship between states at different loci. Each row of boxes correspond to a locus; boxes represent a state and indicate the numbers of recombinations the state incurs; arrows point to previous state(s). Once the system deduces a single state at some locus - shown here as the bottom box - it back traces by traversing the pointers and assigns the haplotype values from the states it encounters. The numbers are not from real data.
Williams et al. Genome Biology 2010 11:R108 doi:10.1186/gb-2010-11-10-r108