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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.
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 ...
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]
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.
Humanitarian officials and some US officials argue that the US is ceding influence to China in South and Central America because of Trump’s policies like the foreign aid freeze, which they say ...
The majority of humans actually follow this protocol as well, and down-regulate lactase production around 3-5 years of age. Interestingly, though, the majority of caucasians, mainly those from northern european background, continue to have elevated lactase activity all the way into adulthood, and so they exhibit “lactase persistence”.
50 kya – 30 kya: Mousterian Pluvial in North Africa. The Sahara region is wet and fertile. Late Stone Age begins in Africa. c. 50 kya: Denisova hominin lives in the Altai Mountains, [31] with oldest estimated to be c. 76 kya. [32] 45 kya: The earliest known representational art: a painting of three Celebes warty pigs in Leang Tedongnge cave ...