highly significantP value = 4.6 × 10 -5
The results are shown in Figure 2 , with the probability of belonging to the Dent and the Flint groups for each parental line (Figure 2 A) and the highly significant correlation ( P value = 4.6 × 10 -5 ) observed between the GWRR in a population and the average 'flintness' of its parents (Figure 2 B).