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Lactase persistence or lactose tolerance is the continued activity of the lactase enzyme in adulthood, ... [33]) and the Khoe from South Africa. ...
Today, lactase persistence can be found in 90% or more of the populations in Northwestern and Northern Central Europe, and in pockets of Western and Southeastern Africa, Saudi Arabia, and South Asia. It is not as common in Southern Europe (40%) because Neolithic farmers had already settled there before the mutation existed.
Lactase persistence in humans evolved relatively recently (in the last 10,000 years) among some populations. Around 8,000 years ago in modern-day Turkey, humans became reliant on newly-domesticated animals that could be milked; such as cows, sheep, and goats. This resulted in higher frequency of lactase persistence. [79]
Mark G. Thomas (born 5 June 1964 on Kingston-upon-Thames, Surrey, England) is a human evolutionary geneticist, Professor of Evolutionary Genetics at the Research Department of Genetics, Evolution and Environment at University College London since 2009. [1]
Genetic evidence shows that lactase persistence developed in East African populations between 7000 BP and 3000 BP, which is consistent with existing evidence for the introduction of livestock. [11] According to genomic data from 2019, the herders moved into Eastern African around 5,000 BP, and they carried both ancestry from the Near-East and ...
This population would have crossed via the Sinai Peninsula and then split into two, with one branch continuing west across North Africa and the other heading south into the Horn of Africa. The authors propose that the "Ethio-Somali" component may have been a substantial ancestral component of the Proto-Afroasiatic-speaking population.
English: Interpolated map of the percentage of adults with a known lactase persistence genotype (-14010 G>C, -13915 T>G, -13907 C>G or -13910 C>T) in the indigenous population of the Old World. Circles mark the sample locations.
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