Fig. 3From: Population genomics reveals that an anthropophilic population of Aedes aegypti mosquitoes in West Africa recently gave rise to American and Asian populations of this major disease vectorDifferences in allele frequencies between populations. a Two-dimensional site frequency spectra. Colours represent the number of sites at a given frequency within each population (0-20) with frequency increasing from left to right and bottom to top in each spectrum. Allele frequencies were estimated using 10 randomly sampled individuals from each population. b Pairwise F ST Back to article page