Red hair is associated with the gene MC1R, a recessive and somewhat rare gene that occurs in only about 2% of the world's population, according to the National Institutes of Health. That means both parents must carry a copy of the gene to produce a red-haired child and often the trait skips generations.
Irish people developed their red hair because of a lack of sunlight, according to new research from a leading DNA lab. Irelands DNA has revealed that one in 10 Irish people have red hair but it is thought that up to half the population could be carrying the redhead gene even though they are blonde or brunette.
4. While red hair is synonymous with Ireland, it didn't even originate there. Red hair can actually be traced back to Central Asia. So whether you're a redhead with Irish roots or not, your genes probably originated from the same place.
Ireland has the highest number of red-haired people per capita in the world, with the percentage of those with red hair at around 10%. Great Britain also has a high percentage of people with red hair.
Red hair has long been associated with Celtic people. Both the ancient Greeks and Romans described the Celts as redheads. The Romans extended the description to Germanic people, at least those they most frequently encountered in southern and western Germany.
Redheadedness is a north and western European trait, but the pattern of redheads in the British Isles is more consistent with the ancient indigenous Celtic inhabitants who were here before the Vikings and the Anglo-Saxons.
Historically, it's thought that the Celtic people, originating in Central Europe and spreading to Western Europe and the British Isles, had a higher prevalence of redheads. Vikings, too, had redheads among them, but not to the extent often depicted in popular culture.
Having red hair and blue eyes is the rarest hair/eye color combination possible. The odds of a person having both of those recessive traits is around 0.17%. Instead, most redheads have brown, hazel or green eyes, according to Medical Daily.
The percentage of redheads in Ireland hovers around the 10% mark. Scotland weighs in at around 6%, followed by England at around 4%. Scottish people may disagree, but we say Ireland is the undisputed world capital of redheads.
Red hair is associated with the gene MC1R, a recessive and somewhat rare gene that occurs in only about 2 percent of the world's population, according to the National Institutes of Health. That means both parents must carry a copy of the gene to produce a red-haired child and often the trait skips generations.
Red- or blonde-haired Vikings? Genetic research has shown that the Vikings in West Scandinavia, and therefore in Denmark, were mostly red-haired. However, in North Scandinavia, in the area around Stockholm, blonde hair was dominant.
Yes, Vikings did have red beards. According to sources, red hair and beards are a genetic trait that is specific to Nordic tribes. It's even thought that some Norsemen would dye their red hair and beards to look blond using lye soap.
An estimated 46% of the Irish population carry the recessive freckle gene. Almost half, but carrying this gene doesn't mean that you'll notice any freckles. As a result, redheads are still in the minority in Ireland, although in high concentrations throughout the country.
The Science behind Red Hair
Ireland has the highest per capita percentage of redheads in the world — anywhere from 10% to 30%. Outside Europe, only 0.06% of people are redheaded.
It is no wonder, then, that the ancient Irish divine pantheon included a red-haired goddess. Her name was Brid. According to myth, Brid was born full-grown at sunrise in a house ablaze with light. A fiery column reached from her flame-red curls into the heavens.
Previous studies had shown that redheads inherit two versions of the MC1R gene that leads to red hair – one from their mum and one from their dad. Although almost everyone with red hair has two copies of the red-haired version of MC1R, not everyone carrying two red-haired versions is a redhead.
However, redheads are not only Celts or Caucasians. Their distribution is a testament to the global movement of DNA across societies and landscapes. Although most common in Northern Europe, parts of Russia, and among European descendants in Australia, there are redheads from all ethnicities and races.
Contrary to what many people assume, redheads did not originate in Scandinavia, Scotland or Ireland, but in central Asia. Their coloring is due to a mutation in the MC1R gene that fails to produce sun-protective, skin-darkening eumelanin and instead causes pale skin, freckles and red hair.
Most redheads have a gene mutation called MC1R. This type of gene must be carried by both parents in order for a child to potentially be born with red hair. Lots of people carry the gene but don't have red hair themselves. This is often why we see red hair skipping a generation or even multiple generations.
According to an article by evolutionary biology professor Mark Elgar, PhD, of the University of Melbourne, blue-eyed redheads are the absolute rarest, with 0.17% of the population having that combination of hair and eye color.
One of the many facts about redheads is that their hair will never turn grey. The pigment in their hair that causes it to be red will just fade over time, causing their hair to turn blonde or white, but never grey.
The rarest hair and eye color combination is red hair with blue eyes, occurring in less than 1% of the global population.
The rarest natural hair colour is red, which makes up only one to two percent of the global population. You commonly see these hair colours in western and northern areas of Europe, especially Scotland and Ireland. However, natural redheads may not exist for much longer.
Red hair is a recessive trait, which means that only those who get two “redhead” versions of the gene, one from the mother and one from the father, will have red hair.
It was caused by a mutation in the M1CR gene which caused hair to turn red, but in return, this mutation is what allowed red-haired folks to be more efficient at absorbing much-needed UV light. These pioneers from Central Asia eventually migrated throughout Europe and to the British Isles during the Bronze Age.