In addition, I am looking at a possible correlation between the presence of M1 in North and East Africa, and the Afro-Asiatic language family, which exists in a generally comparable region as M1. Further research in this area may help to understand more fully the relationship between genetic and linguistic change.I had referenced this work recently inspired by an abstract which appeared in the annual meeting of the AAPA:
African Language Families: Illustrates the diverse linguistic families of the African continent. The Afro-Asiatic Language family may be related to the M1 mitochondrial haplogroup, as both are present in the same general areas of Africa and the Middle East.
The second great puzzle is mtDNA haplogroup M1 which occurs in East and North Africa, West Asia and Southern Europe, but not apparently anywhere else. M1 is a branch of the mainly Asian macrohaplogroup M, which is of great antiquity in Asia and likely originated there. According to a recent abstract, Holden et al. indicate that M1 is found at high frequencies in East and Northern Africa but not in Sub-Saharan Africa, and hint that it may be linked to the Afro-Asiatic language family. This suggestion is reasonable, and in my opinion the correspondence between M1 and Y-chromosome haplogroup E3b is quite remarkable throughout the broad peri-Mediterranean region, with E3b also reaching high frequencies in Afro-Asiatic speakers.