![]() ![]() ![]() Watch the video “ Why Do You Have Blue Eyes?” which explains in a simple way the genetics of blue eyes. Scientists concluded that every blue-eyed person on the world today can trace their ancestry back to a single European who probably lived about 10,000 years ago in the Black Sea region and who first developed a specific mutation that accounts for the now widespread iris coloration. Population, I have brown hair and blue eyes and I havent met anyone with the same combination. Scientist discovered that more than 99.9 per cent of blue-eyed people who volunteered to have their DNA analyzed have the same tiny mutation in the gene that determines the color of the iris. Its about 2 of the world and 5 of the U.S. Beauty in a genetic mutation Blue eyes are the. Today, around 20-40% of European people have blue eyes. Just over a third (35) of the population of south-west England and 41 in east England have blue eyes, compared to 57 in southeast Scotland. This alteration switches off OCA2, the gene that determines the amount of the brown pigment melanin that we make. Scientists studying the genetics of eye colorhave identified that a mutation to a separate, nearby gene called HERC2 is the cause of blue eyes. Originally, all humans had brown eyes, although genetic variation relating to a gene called OCA2 resulted in changes to the amount of pigment produced by different individuals, resulting in the emergence of different shades of brown eyes. We know that blue eyes are much rarer than brown eyes, with Heathline estimating that between 8 and 10 percent of the world's population have blue eyes. This way they have shown that the earlier belief that blue eye color is a simple recessive trait is incorrect. 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. So far, up to 16 genes have been associated with eye color inheritance. Perceived as the least aggressive.Humans have many phenotypic variations in eye color which is determined by multiple genes. Hazel – Approachable, fun, and even a little mischievousĥ. Green – Fiery temper, sexiness, and high energy.Ĥ. Brown – Self confident, driven, gentle, loyal, and trustworthy.ģ. Learn more about what causes color blindness. ![]() And color vision may get worse as you get older often because of cataracts (cloudy areas in the lens of the eye). Color blindness can also happen because of damage to your eye or your brain. All blue-eyed people may have a common ancestor. The most common kinds of color blindness are genetic, meaning they’re passed down from parents. Blue Eyes – Sensitive to light, sweet and kind individuals and can reflect intelligence and lower confidence and self esteem.Ģ. Worldwide, fewer than 9 of people have blue eyes. This is one reason why blue colour contact lenses are popular. A larger percentage of Males report Blue eyes (39.06 to 33.42). Everyone with blue eyes is related Between 6,000 and 10,000 years ago, a baby was born in Europe with a harmless genetic mutation. Rather than including a blue pigment, they actually just lack the pigment that makes eyes brown. The meaning of colors are listed below.ġ. reasons for the dependence between the two variables in the population of our students. Worldwide, fewer than 9 of people have blue eyes. Green and brown following in second and third place. Dark Brown Irises – 25% Meaning of Eye Colorīlue is the most popular choice for colored contact lenses. In Africa dark eyes, skin and hair are the norm, but blue eyes are more common in southern Europe and even more common in northern Europe, where 70 per cent of people have blue eyes. Green/Light Brown Irises with Minimal Specks – 12%ĥ. As you might have guessed, brown eyes take the top spot. Though blue is the second-most-common color in humans, only eight to 10 percent of the population can boast about their baby blues. Blue/Grey/Green Irises with Brown/Yellow Specks – 15%ģ. As it turns out, your eye color may have landed you in one of the most exclusive groups in the world. There was a higher frequency of change from blue to non-blue iris colours (blue to brown 27, 11/40, blue to hazel 7.5, 3/40 and blue to green 5, 2/40 p < 0.001). According to the American Academy of Ophthalmology, the following eye color statistics exist in the United States. Blue eyes also account for less than 8% of the global population. ![]() By 1950, less than 35% of the American population had blue eyes. Now, adds are that a baby born today will have brown eyes. More than half of the United States population were blue eye Caucasians. ![]()
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