FIG. 6.—

Comparison of volatility in the three pheromone gene families. The Mouse Paralogy Browser (She et al. 2008) was used to search for volatility occurring by insertion and deletion in all three gene regions. For each strain shown, the upper gray bar represents the locations of the probes. In the lower bars, blank areas represent no change from the C57BL/6 control (the mouse genome); dark and light blue bars represent insertions at P ≥ 0.9 and P ≥ 0.8, respectively; red and yellow bars represent deletions at P ≥ 0.9 and P ≥ 0.8, respectively. Black bars are insertions and deletions below those confidence levels.