FIGURE 6.

(a) Similar enrichment terms of the positively selected genes related to the sensory system in the four branches of subterranean mammals. (b) Comparison of the percentages of expanded gene families related to olfactory receptors in the four groups. (c) Comparison of the percentages of expanded gene families related to the vomeronasal receptor in the four groups. Each color represents a subterranean branch. Notes: (a) Histogram represents the count of the terms, and the black dot represents the p value. (b) and (c) Histograms represent the percentages of expanded gene families