The two main haplotype clusters around Cyp9k1 in Burkina Faso, Ghana, and Guinea are associated with respective CNV alleles. Points are jittered to show overlapping data. Lines show least-squares regression through the data. (A) Strong correlation between Cyp9k1_Dup11 and haplotype Cluster 1. Most of the points lie on a line of slope 0.5, indicating that Cyp9k1_Dup11 is found most frequently as a triplication (two extra copies per chromosome), although both lower and higher copy number versions of this CNV exist. (B) Weaker correlation between Cyp9k1_Dup15 and haplotype Cluster 2.