It is also possible that males dislike ornamented females because blue badges indicate a potentially negative quality in females. Although both sexes may develop similar ornaments because they share the genes that underlie the phenotype, expressing the ornament can be beneficial in one sex but detrimental in another. “One solution is to have the expression of [ornamentation] regulated by other factors that are already different between sexes,” the University of Virginia’s Robert Cox explained in an e-mail to The Scientist.