A haplotype network shows the relationship among haplotypes(a) There are a total of six haplotypes (A–F) in the aligned DNA sequences from seven individual chromosomes from different people. (b) These six haplotypes are joined in a haplotype network showing the relationships among the haplotypes. Each circle represents one of the six haplotypes. Any two haplotypes differ at the loci noted on all of the branches connecting them. The asterisks show the location of SNPs.