FIG. 14.13 Origin of the β-globin gene family. The β-globin gene family evolved through several episodes of duplication and divergence. Data from: Y. A. Trusov and P. H. Dear, 1996, “A Molecular Clock Based on the Expansion of Gene Families,” Nucleic Acids Research 24(6):995–999.

Data from: Y. A. Trusov and P. H. Dear, 1996, “A Molecular Clock Based on the Expansion of Gene Families,” Nucleic Acids Research 24(6):995–999.