55 percent

Melanesians of some islands are one of the few non-European peoples, and the only dark-skinned group of people outside Australia, known to have blond hair. The blonde trait developed via the TYRP1 gene, which is not the same gene that causes blondness in European blonds.

Top 10 countries with the most pure blonde hair: 1. Finland 58% , 2. Sweden 54%, 3. Norway 48%, 4.

Almost half (48%) of Brits are natural brunettes, around three in ten (29%) are natural blondes and 8% have natural black strands. Alex Fisher, Senior Beauty Analyst at Mintel, said: “As the majority of Brits have naturally darker hair, lightening their locks blonde is the nation’s most obvious hair colour solution.

Geographic distribution. Brown-haired individuals predominate in most parts of Europe. In northern and central Europe medium to light brown shades are the most common, while darker shades prevail in the rest of the continent.

Black hair is most common in Asia and Africa.Though this characteristic can also be seen in people of Northwestern Europe, it is less common. People of Celtic heritage in Ireland with such traits are sometimes known as the “Black Irish”.

One study found that the red hair-green eyes genetic combination is one of the rarest, at -0.14 correlation.

Red hair is a recessive gene that occurs in about 2 percent of the world’s population. Redheads have a reputation for having bad tempers. Redheads have a higher tolerance for spicy foods. Redheads need 20 percent more anesthesia than people with other hair colors.

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. Red hair occurs naturally in one to two percent of the human population, while just 17 percent of the world’s population has blue eyes.

Specifically, redheads have a mutated melanocortin-1 receptor (MC1R) gene that produces an altered receptor for MSH. Melanocytes, the cells that produce pigment in skin and hair, use the MC1R to recognize and respond to MSH from the anterior pituitary gland.

They may be ginger — but their skin isn’t. In a seemingly paradoxical study, US researchers found that redheads have a preternaturally high pain tolerance — wait for it — due to a mechanism that ups their susceptibility to sunburns.

Limited research suggests redheads may be more likely to be left-handed. Like red hair, left-handedness is a recessive trait. In the Western hemisphere, 10 to 15 percent of people use their left hand dominantly. Redheads are thought to be more sensitive to pain, too, research shows.

Red‐haired individuals are known for their reputation of increased bleeding during surgical procedures and in women after childbirth [1]. However, only a few sound scientific studies have been performed to assess the association between red hair and bleeding.

The updated pain score analysis showed that, compared with dark-haired individuals, the pain scores were 1.05 higher for dark brown-haired, 1.08 higher for light brown-haired, 1.25 higher for blonde-haired, and 1.54 higher for red-haired participants, after adjusting for potential confounders (P<0.0001 for all, last …

The gene for red hair is recessive, so a person needs two copies of that gene for it to show up or be expressed. That means even if both parents carry the gene, just one in four of their children are likely to turn out to be a redhead.

Of greater relevance is that ginger can give people a tendency to bleed. Ginger may interact with the anticoagulant warfarin, inhibit platelet aggregation (by inhibition of thromboxane production from arachidonic acid) and increase fibrinolysis. So, it appears that ginger and bleeding are linked after all.