Fig. 1From: Experimental evolution under hyper-promiscuity in Drosophila melanogaster Mating frequency over the course of experimental evolution. (a) The percentage of time in which flies were observed mating in replicate populations (1–4) in which flies did (Control) or did not express sex peptide receptor (SPR-). (b) The proportion of time in copula for SPR- populations relative to control populationsBack to article page