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Response to selective breeding for night sleep followed by relaxed selection. Flies were selectively bred for 13 generations, followed by relaxed selection for 62 generations (ending at generation 75). (A) Night sleep duration. (B) Allele frequency for a polymorphism in ringmaker. The y-axis indicates the proportion of alleles that are “A” in each population, as opposed to the opposite allele, “G”. Plots created by combining data from references [28, 41], used under CC BY 4.0.
