Blue is the second most common eye color globally, with an estimated 8 to 10 % of people having blue eyes. A majority of these people are of European descent, however, Black people can be born with blue eyes even though it’s pretty rare.
To understand how this uncommon occurrence can happen, you must first look at the origins of blue eyes, which scientists say is a fairly newer phenomenon.
The Science Behind Blue Eyes
Early research from the University of Copenhagen studied 800 men and women from several countries with blue eyes. The team found that all the participants have the same DNA sequence for blue eyes, thanks to a genetic mutation that took place an estimated 10,000 years ago.
“Originally, we all had brown eyes,” Professor Hans Eiberg from the university’s Department of Cellular and Molecular Medicine, argues in the study. “But a genetic mutation affecting the OCA2 gene in our chromosomes resulted in the creation of a ‘switch’ which literally ‘turned off’ the ability to produce brown eyes.”
The OCA2 gene formerly called the P gene is a gene code that produces a pigment called melanin, according to scientists with Medline Plus. Melanin is the substance that gives skin, hair, and eyes their color.
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SOURCE: Travel Noire, Parker Diakite