The emergence of wheat and milk allergies could be explained by a new account of the human race's 'out of Africa' expansion that began 60,000 years ago.
The comprehensive review of humans' anthropological and genetic records gives the most up-to-date story of how the global migration had a dramatic effect on human genetic diversity.
As small groups of modern humans migrated out of Africa in Eurasia and the Americas, the genetic diversity of their descendants was substantially reduced.
Gluten-free bread: A new study says the emergence of gluten intolerance can be traced back to the evolutionary success of certain populations as the human race migrated across the world from Africa
However, in studying these migrations, previous genomic projects haven't fully taken into account the rich archaeological and anthropological data available, and vice versa.
This latest review by three Stanford geneticists integrates both sides of the story and offers a foundation that could lead to a better understanding of ancient humans that could lead to medical advances.
'People are doing amazing genome sequencing, but they don't always understand human demographic history,' said review co-author Brenna Henn, a postdoctoral fellow in genetics at the Stanford School of Medicine.
'We wanted to write this as a primer on pre-human history for people who are not anthropologists.'
Read more: http://www.dailymail.co.uk/sciencetech/article-2221906/New-analysis-humans-expanded-Africa-explain-rise-wheat-milk-allergies.html#ixzz2AB9kYBV3
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