Fig. 7
From: Population size influences the type of nucleotide variations in humans
Correlation between the geographical distance of non-African populations from East Africa (Addis Ababa) and the ratio AT→GC/GC → AT (β) using (a) Homozygous (b) Heterozygous SNVs. The relationship was highly significant for homozygous SNVs (P < 10− 6) and not for heterozygous SNVs (P = 0.2). The distances between the locations of the non-African populations and Addis Ababa were obtained from previous studies [2, 6]