Chapter 3: Handy Genes

Although the experiments in this chapter were helpful in revealing many traces to our "inner fish" they seem to be very unpleasant for the animals being tested on. Some of the experiments were to study genetically mutated animals or experiments "when things go wrong"(48). The discoveries, however, like the ZPA and Sonic Hedgehog were quite significant to Shubin's theory linking our genes to a lot of different animal species, like mice and sharks.