
Mouse family tree. The 102 strains tested are organized into seven groups. Group 1, Bagg albino derivatives; Group 2, Swiss mice; Group 3, Japanese and New Zealand inbred strains; Group 4, C57/58 strains; Group 5, Castle's mice; Group 6, C.C. Little's DBA and related strains; Group 7, wild-derived strains. A detailed description of each group is included in the text. The length and angle of the branches have been optimized for printing and do not reflect the actual evolutionary distances between strains.











