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Why do people in the North have blonde hair and blue eyes?

Why do people in the North have blonde hair and blue eyes?

It seems like the same thing might have happened in northern Europe in the Ice Age. Around this time, humans were hunter-gatherers, so most men were off hunting for (and being killed by) wooly mammoths and such. For whatever reason, men in these populations developed a preference for blonde hair and blue eyes.

What is the rarest eye color in North America?

green eyes
In addition to being the rarest eye color among Americans, green eyes are the most attractive, according to 66,000 people who voted in our survey. Just how rare are green eyes?

What is the evolutionary reason for blue eyes?

People with blue eyes have a single, common ancestor, according to new research. A team of scientists has tracked down a genetic mutation that leads to blue eyes. The mutation occurred between 6,000 and 10,000 years ago. Before then, there were no blue eyes.

Are blue eyes the result of inbreeding?

Blue eyes in humans happened because of a recessive trait mutation that basically prevents the production of melanin in the iris inside the eyes, it is not reliable for determine inbreeding. Blue eyes is a sign of lacking melanin in your eyes. No. Not because of inbreeding.

Where does the Blue in my eyes come from?

So far, up to 16 genes have been associated with eye color inheritance. However, scientists from the Institute of Forensic Genetics at the University of Copenhagen discovered that the reason for blue eyes mainly lies in two genes: OCA2 and HERC2.

Why do people with brown eyes have blue eyes?

Eye colour depends on the amount of a single type of pigment (called melanin) in the iris of the eye. This genetic switch, located in the gene next to the OCA2 gene, limits the production of melanin in the iris — effectively “diluting” brown eyes to blue.

Why are Baby’s Eyes Blue when they are born?

When a baby is born, melanin hasn’t yet been fully deposited into the iris of the child’s eye, which results in the iris being blue. But after a certain period, the genetics kick in and melanin production either ramps up, changing the color of the baby’s eye, or doesn’t, rendering the color of the iris blue for life.

Why are blue eyes more susceptible to sun damage?

Because blue eyes contain less melanin than green, hazel or brown eyes, they may be more susceptible to damage from UV and blue light.