Occurring in just one or two out of every 100 people, red hair is here to stay, say geneticists
of the ancient Thracians was depicted on Greek pottery with carrot-colored hair and beard.
In people who have red hair, the skin cells that produce pigment have a variant receptor on the cell surface. When exposed to UV light, this variant fails to trigger a switch that changes melanin pigment from yellow/red to the protective brown/black. “is one of several genes that work together to produce dark melanin, and without that switch, you’re going to have light skin,” says Zorina-Lichtenwalter—and easily burn when out in the sun.
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