As the population grows and people have babies, the genes for less melanin will become more common. That makes the link between lighter eyes, hair, and skin tighter. So that's why you see people with blond hair typically have blue eyes!
So let's plug in what we know probability of blonde hair is 28.3 Probability or percentage of blue eyed people is 16.6%. And then the probability of both blond hair and blue eyes is 9.3%.
Is it possible for an adult with naturally blond hair to have brown eyes? Inheritance of eye color is more complicated than we had once thought. So the answer is yes, but the combination is extremely rare.
Because blond hair tends to turn brown with age, natural blond hair is significantly less common in adulthood; according to the sociologist Christie Davies, only around five percent of adults in Europe and North America are naturally blond.
Some sources, such as Eupedia, claim that in central parts of Norway, Sweden, Denmark, Iceland and Finland, 80% of the population is blonde, with natural fair-haired people in other Baltic Countries (Latvia, Lithuania, Estonia, and other parts of Scandinavia) making up 50-79% of the population.
Finland. Finland has the highest blond hair population by percentage of the total population. Nearly 80% of the population has blond hair, and an astounding 89% of the population has blue eyes. Blond hair and blue eyes are one of the rarest combinations in the world.
True blonde is also a rare hair color, and the Daily Mail reports that only 12.7 percent of women have pure blonde hair, and only 9.9 percent of men do. Surprisingly, many of the genetic differences identified by the researchers correlated with factors other than pigmentation like hair texture and growth.
There's a little genetic tweak that makes the combination of red hair and blue eyes the rarest of them all. The same Nature study mentioned above found that another gene variant, HERC2, interacts with both the MC1R gene and the OCA2 gene—and it can shut off the redhead gene while expressing blue eyes and blonde hair.
But some children with light hair, including towhead blonds, strawberry blonds, dishwater blonds and redheads, see their hair go dark brown by their 10th birthday. The reason for this change is because the amount of eumelanin in your hair increases as you mature, according to some research.
World Atlas notes that only 8% to 10% of the global population has blue eyes. Violet eyes are even rarer, but they're a bit misleading; someone with “violet” irises is usually sporting a special shade of blue.
Scientists believe that it is possible to trace all blue-eyed people back to a common ancestor, who likely had a genetic mutation that reduced the amount of melanin in the iris. Most people with blue eyes are of European descent.
While the study concluded that the average age for a woman to go grey is 33, it found redheads lose their colour at 30, brunettes at 32 and blondes at 35. For one in 10 women, those first grey hairs appear by the time they reach 21-years-old, while one in four women find their first grey by the age of 25.
Green: Bright Blonde
Green eyes are the rarest eye color around.
Blonde fact #4: Not all blondes have blue eyes
That's why so many people around the world have black strands and brown eyes. Lighter tint gives rise to lighter coloured eyes, including blue, but also varying tones of green and grey. So, just because you have blonde hair, it doesn't mean that you have blue eyes too.
The reason has roots in evolutionary psychology. Both blonde hair and blue eyes are recessive traits, so both parents must carry the gene for blonde hair to pass it on to their kids.
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.
Overall, men find women with brown hair and blue eyes to the sexiest and most attractive.
'It's extremely rare for people to have hair that is naturally a strawberry blonde color. Basically, strawberry blonde is mostly based on red tones, with blonde highlights dotted here and there. It takes its name from the Italian renaissance.
The study found that the average IQ of blondes was actually slightly higher than those with other hair colors, but that finding isn't statistically significant, said Zagorsky, who works in the university's Center for Human Resource Research (CHRR).
The international scientific team found a total of 124 genes that play a major role in determining human hair colour and, unexpectedly, discovered that women were twice as likely to be naturally blonde than men. In comparison, they also revealed that men were three times as likely as women to have black hair.
No, they don't. Blonde hair seems to have appeared more than once in humans. Which means that different blondes trace back their blonde hair to different ancestors. This is actually true of a lot of different traits.
The State that has the most blondes and natural blondes is Minnesota. Minnesota has a background and history of Scandinavians and German ancestry. So it is not California. Are natural blondes rare among most of England (UK)?
A genetic mutation that codes for the blond hair of Northern Europeans has been identified. The single mutation was found in a long gene sequence called KIT ligand (KITLG) and is present in about one-third of Northern Europeans. People with these genes could have platinum blond, dirty blond or even dark brown hair.