Global distributions of lactase persistence alleles (Liebert et al. 2017)

The series of maps below is from a new paper by Liebert et al. at Human Genetics. Almost certainly, any population with a sizable level of the 13910*T allele has relatively recent (post-Mesolithic) ancestry from Europe. In that context, note the presence of 13910*T in South Asia and North Central Africa. Populations in these regions also show high frequencies of two Y-chromosome haplogroups that