Just A Bit Of DNA Helps Explain Humans' Big Brains : Shots

February 19, 2015 6:48 PM

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The size of the brain of a chimpanzee (right) is considerably smaller than that of a human brain. Probably multiple stretches of DNA help determine that, geneticists say.

Scientists studying the difference between human and chimpanzee DNA have found one stretch of human DNA that can make the brains of mice grow significantly bigger.

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