From: Gene expression variation in African and European populations of Drosophila melanogaster
 | X chromosome | Autosomes | X/A ratio* |
---|---|---|---|
Number and percentage of polymorphic probes | |||
   Overall | 335 (35.8%) | 1,559 (37.9%) | 0.945 (P = 0.22) |
   Europe | 155 (16.5%) | 809 (19.7%) | 0.838 (P = 0.027) |
   Africa | 168 (17.9%) | 871 (21.2%) | 0.844 (P = 0.025) |
   Between | 277 (29.6%) | 1,323 (32.2%) | 0.919 (P = 0.12) |
Average percentage of pairwise differences | |||
   Overall | 2.02 | 2.90 | 0.697 (P = 0.040) |
   Europe | 1.77 | 2.68 | 0.661 (P = 0.014) |
   Africa | 1.86 | 2.64 | 0.705 (P = 0.017) |
   Between | 2.20 | 3.11 | 0.708 (P = 0.035) |