Simulated data in which HWE is observed to the limit of rounding errors (whole number values for counts of individuals). (A) Number of biologically possible solutions to the cubic equation in (A) 10 individuals; (B) 60 individuals; (C) 100 individuals (D) 1000 individuals. x-axis: allele frequency of SNP1, y-axis: allele frequency of SNP2. Black = more than one solution. Grey = one solution.