Most people in the world are lactose intolerant, but a genetic mutation where a cytosine (C) nucleotide in a person’s DNA is replaced with a thymine (T) nucleotide allows them to digest milk.
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Most people in the world are lactose intolerant, but a genetic mutation where a cytosine (C) nucleotide in a person’s DNA is replaced with a thymine (T) nucleotide allows them to digest milk.
