Figure 2From: Asymmetrical sexual isolation but no postmating isolation between the closely related species Drosophila suboccidentalis and Drosophila occidentalis Mating rates of crosses involving hybrids. Mating rates of hybrids relative to pure species crosses in no-choice mate trials. Error bars are the 95% binomial confidence intervals, and the sample size is indicated within each bar. “Subo” refers to D. suboccidentalis, “Occ” refers to D. occidentalis, “F1(OxS)” are F1 hybrids from a D. occidentalis female, and “F1(SxO)” are F1 hybrids from a D. suboccidentalis female.Back to article page