What is the secret of blue eyes?

People with blue eyes have a completely colourless stroma with no pigment at all, and it also contains no excess collagen deposits. This means that all the light that enters it is scattered back into the atmosphere and as a result of the Tyndall effect, creates a blue hue.

thehealthyjournal.com - What is the secret behind blue eyes? - The Healthy Journal

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What is the secret behind blue eyes?

What is the secret of blue eyes?

How did humans get blue eyes?

Why are blue eyes so rare?

Is it true all blue-eyed people are related?

Understanding Behind Blue Eyes

What is the rarest eye color?

Can blue eyes see better in the dark?

What are the 3 rarest eye colors?

Are blue eyes the stronger gene?

Who was the first blue-eyed person?

Do blue eyes have any advantages?

Can 2 brown eyed parents have a blue-eyed child?

Are blue eyes becoming extinct?

Why are blue eyes seen as more attractive?

Are blue eyes more intelligent?

What country has the most blue eyes?

What is the strongest eye colour gene?

Can Asians have blue eyes?

Which parent determines blue eyes?

What is the prettiest eye color?

Do purple eyes exist?

Are there black eyes in humans?

Do blue eyes change with mood?

Are people with blue eyes more sensitive to pain?

Are all babies born with blue eyes?

Yes, that's right – your blue eyes are all down to one single person. The researchers found that a genetic mutation which occurred 6000 -10000 years ago is responsible for every single pair of blue eyes in the world today.Blue-eyed? Thank a genetic switch that turns off your body's ability to make brown pigment in your peepers. Researchers have finally located the mutation that causes blue eyes, and the findings suggest that all blue-eyed humans share a single common ancestor born 6000 to 10,000 years ago.Blue eyes are rare, making up just 8-10% of the world's population. Blue eyes are caused by a relative lack of melanin in the iris. Just like your skin and hair, how much melanin you have determines your eye color.blue eyes descend from a single genetic mutation means that every single person on the planet with blue eyes descended from one common ancestor. In fact, a team of geneticists at the University of Copenhagen actually traced that mutation all the way back to a single Danish family.Green is considered by some to be the actual rarest eye color in the world, though others would say it's been dethroned by red, violet, and grey eyes.Blue eyes. This is the next most common eye color, encompassing about 10% of the population. While blue eyes are more sensitive to light during the day, people with blue eyes tend to see better at night – unless there are bright lights.Of those four, green is the rarest. It shows up in about 9% of Americans but only 2% of the world's population. Hazel/amber is the next rarest of these. Blue is the second most common and brown tops the list with 45% of the U.S. population and possibly almost 80% worldwide.The allele genes come in the form of brown, blue, or green, with brown being dominant, followed by green, and blue being the least dominant or what is called recessive. Given this information, you can determine what eye colors are dominant in the parents.In 2006, researchers discovered a 7,000 year old body from the Stone Age in the La Brana cave system in Leon in Northern Spain (Image 4). Genetic testing determined that this man had blue eyes. It was not in itself unusual, but what is remarkable is that he is the earliest known person with blue eyes.Advantages of Blue EyesA big advantage to blue eyes is that research shows they might be linked to a lower risk of developing cataracts. Cataracts are clouding of the eye's lens. According to some studies, blue eyes may have evolved because these individuals were able to cope better with seasonal affective disorders.Yes. The short answer is that brown-eyed parents can have kids with brown, blue or virtually any other color eyes. Eye color is very complicated and involves many genes.Are blue-eyed humans going the way of the dodo? Well, no. We cleared up that rumor about redheads going extinct; the same goes for blue eyes. While the trait is becoming more rare, it's unlikely it will disappear all together.People consider blue eyes attractive, but in reality, blue is rated as attractive as other iridal colors. Bright scleral color and large pupils positively affect attractiveness because both features are significantly correlated with youthfulness.Interestingly, in contrast to brown eyes, blue eyes were not associated with intelligence as only 7 percent of respondents thought of blue-eyed people as intelligent.Estonia is the country with the most blue-eyed individuals in the world. 89% of its population have blue eyes.The allele for brown eyes is the most dominant allele and is always dominant over the other two alleles and the allele for green eyes is always dominant over the allele for blue eyes, which is always recessive.There are plenty of blue-eyed Asians. This probably happens when the traditional blue-eyed allele comes into a family from a (possibly very distant) European ancestor. Blue eyes then resurface in a child generations later if they inherit the allele from both parents.The laws of genetics state that eye color is inherited as follows: If both parents have blue eyes, the children will have blue eyes. The brown eye form of the eye color gene (or allele) is dominant, whereas the blue eye allele is recessive.We found that green is the most popular lens colour, with brown coming in a close second, despite it being one of the most common eye colours. Although blue and hazel are seen as the most attractive eye colours for men and women they are surprisingly the least popular.Yes, natural purple eyes are possible. There are many different shades of blues and greys out there and many in-between colors. Although very rare, some people's natural pigmentation can even be violet or purple in color.There's an eye disorder known as aniridia which makes the eye appear to have “no iris.” In truth, there is a small ring of iris tissue but it is so small and the pupil is so large that it can look like the eyes are completely black. It is due to a chromosome mutation.The pupil can change size with certain emotions, thus changing the iris color dispersion and the eye color. You've probably heard people say your eyes change color when you're angry, and that probably is true. Your eyes can also change color with age. They usually darken somewhat.Doctors may now have to note the eye color of their patients before choosing a procedure to treat them. New research has shown that women with dark brown and hazel eyes respond differently to pain than those with light blue and green eyes.Melanin determines several aspects of our appearance. And while we have the least amount when we enter the world for the first time, remember that babies may be born with eyes of blue, brown, hazel, green, or some other color. It's simply a myth that all of us — or most of us, for that matter — are blue-eyed at birth.

thehealthyjournal.com - What is the secret behind blue eyes? - The Healthy Journal

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