her1-/-; her7-/- individuals that presented scoliosis during the course of the experiment (Figure 3: red bars in bar chart are scoliotic individuals; each bar is a single individual) tended to have the same muscle volume as their phenotypically normal her1-/-; her7-/- mutant siblings (Figure 3: blue bars, non- scoliotic individuals; each bar is a single individual). This evidence concerns the gene EGFR and scoliosis.