180k-Year-Old Mutation Allowed Humans To Become Vegetarians, Move Out of Africa 342
An anonymous reader writes "Early humans were able to move from Africa after a single genetic mutation allowed them to become vegetarians, scientists claim. The switch, which allowed humans to process vegetables, meant that humans were able to move away from water sources and spread across the continent. A team of geneticists compared DNA sequences from a variety of people around the world to see how different populations relate to one another and when they have gone their separate ways. The scientists found that a key genetic variant gave humans the ability to convert fats from plants into essential nutrients for the brain."
is it a mutation? (Score:3, Interesting)
I'm always sensitive to any claims of "mutation X gave humans power Y" because mutations are so rarely beneficial, the majority of evolution comes from sexual inheritance and selection pressure.
So how do they know it was a mutation? Its not like suddenly humans got a hunkering for plants one day. It had to happen gradually, so this gene must have been kicking around for ages, and must have appeared in multiple tribes; one mutated birth isn't going to suddenly diffuse across an entire species.
Basically, I don't understand this article.
Any experts out there want to demystify this for me a little more? How one random gene in one birth suddenly afflicts an entire population?
Comment removed (Score:4, Interesting)
More interesting than that... (Score:5, Interesting)
... being able to eat vegetables is not unusual for ANY monkey or ape. What is more if not most interesting is a genetic mutation which allows us to eat grains. Chimpanzees, for example, simply cannot process grains and as far as I have heard humans are the only primates which can.
Re:is it a mutation? (Score:2, Interesting)