The most authoritative answer in 2024
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Noah Campbell——Works at Google, Lives in Mountain View. Holds a degree in Electrical Engineering from Stanford University.
It has been long established that
curly hair is a
dominant trait in Caucasians and straight
hair is
recessive. ... However, a single
gene has yet to be found to be solely responsible for the
curly (or straight)
hair trait in Caucasians.
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