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Sep 18, 2018 · Only 17% of the world’s population have blue eyes, and only 1 to 2% have red hair. In the array of possible natural hair colors, dark hues are the most common — more than 90 percent of...
- Red Hair And Blue Eyes Is Rare. The combination of having both red hair and blue eyes is so rare because blue eye color is also a recessive trait, meaning both parents must carry the gene for a child to have it.
- Require More Anesthetic. Redheads may be harder to sedate than blondes or brunettes, and require more anesthesia during surgery. In a 2004 study, redhead patients required 20 to 30 percent more anesthetic than other women to reach the same level of sedation.
- Sensitive To Cold And Hot Sensations. Gingers are more likely to be sensitive to cold and hot sensations than people with different hair colors. Researchers at Louisville University in Kentucky found they needed extra doses of anesthetic during surgery, and were susceptible to pain at around 43 degrees Fahrenheit, unlike those with dark hair who didn't begin to flunch until the temperature got down to freezing.
- More Likely To Bruise. Redheads are also more likely to bruise. They have normal blood counts and coagulate blood like others, yet a 2006 study found they bruise more easily.
That’d be red hair with blue eyes. There’s a little genetic tweak that makes the combination of red hair and blue eyes the rarest of them all.
Feb 2, 2018 · Rumour has it that red-haired people with blue eyes are dying out - but what’s the truth about the future of this rarest genetic colour combination? By Dr Nerissa Hannink, University ofMelbourne. For every 100 people in the world, only one or two will have red hair.
Nov 21, 2022 · Is the combination of red hair and blue eyes in one person really the rarest? Some say that it's as simple as them both being recessive genes and having a low prevalence in the world population. But the relationship between hair color and eye color is complex (via Twin Research and Human Genetics).
Feb 1, 2018 · Mark Elgar. For every 100 people in the world, only one or two will have red hair. And when you meet a red head with blue eyes, you are looking at the rarest colour combination of all for human beings. The odds of having both red hair and blue eyes sits at around 0.17 per cent. Picture: Shutterstock.
Jun 28, 2018 · According to Medical Daily, blue-eyed redheads take the prize for rarest hair and eye color combination. Both genes for blue eyes and red hair are recessive, so if you can remember back to high school biology and Punnett Squares , you’ll know just how rare this combo is.
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