Figure 4From: Population genetic analysis of ascertained SNP dataThe observed frequency (grey) of a mutant allele in a sample of 1,000 SNPs simulated under the standard neutral model with the ascertainment scheme of Equation 2 and assuming n = 20 and d = 4: The black bars show the corresponding expected frequencies assuming no ascertainment bias and the white bars show the estimated frequencies using the correction given in Equation 4.Back to article page