Figure 4From: Identification of polymorphisms and balancing selection in the male infertility candidate gene, ornithine decarboxylase antizyme 3 Minimum spanning tree relating inferred haplotypes. Each numbered node (circle) represents a haplotype, and the area of the node represents the haplotype's frequency. Edges (lines between nodes) represent nucleotide differences. Each edge represents one nucleotide difference unless indicated otherwise in parentheses. Ch = chimpanzee, Go = gorilla.Back to article page