Ethanol concentrations of flies with third chromosomes from Austria or Cameroon in the Cameroon genetic background. Stocks were the same as those used for the corresponding survival assays (Fig. 5). Experiment 1 (24 h exposure): region, P>0.7; sex, P=0.01; interaction, P>0.8. Experiment 2 (4 h exposure): region, P>0.4; sex, P=0.09; interaction, P=0.02 (see Results for further statistical analysis).