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Answer
http://en.wikipedia.org/wiki/Red_hair
red hair (also referred to as titian or ginger hair) varies from a deep burgundy through burnt orange to bright copper. It is characterized by high levels of the reddish pigment pheomelanin and relatively low levels of the dark pigment eumelanin. Approximately 1% to 2% of the human population has red hair. It occurs more frequently (between 2% and 6% of the population) in northern and western Europeans, and their descendants, and at lower frequencies throughout other parts of the world. Red hair appears in people with two copies of a recessive gene on chromosome 16 which causes a mutation in the MC1R protein. It is associated with fair skin color, lighter eye colors (gray, blue, green, and hazel), freckles, and sensitivity to ultraviolet light.
ORIGINS
Red hair is the rarest natural hair color in humans. The pale skin associated with red hair may have been advantageous in far-northern climates where sunlight is scarce. Studies by Bodmer and Cavalli-Sforza (1976) hypothesized that lighter skin pigmentation prevents rickets in colder latitudes by encouraging higher levels of Vitamin D production and also allows the individual to retain heat better than someone with darker skin. Estimates on the original occurrence of the currently active gene for red hair vary from 20,000 to 100,000 years ago. Red hair is caused by a relatively rare recessive gene, the expression of which can skip generations
http://www.purgatory.net/kornelia/1603/red_hair_facts.htm
Less than four percent of the world population has naturally red hair. That is less than two percent in America. The gene for Ginger hair was discovered in 1995 and this discovery got little attention. This is not consistent as red heads have gotten lots of it. Professor Jonathan Rees conducted a study of redheads at Edinburgh University.He identified the"gene for red hair" the melanocortin 1 receptor (MC1R), found on the 16th chromosome. He found that this single gene was responsible for red hair.
Red hair is a genetic mutation, and is seen on the heads of only four percent of people. Most of these exist in the U.K., the Republic of Ireland, and Australia. The highest percentage of natural redheads in the world is in Scotland (13%), followed closely by Ireland with 10%. In the US, about 2% of the population are natural redheads.
Red headedness is, genetically speaking, a recessive trait. It may appear after several generations of darker hair. Redheads do NOT turn grey. Red hair turned sandy, then white. They are also found to loose their color later in life than people carrying other hair colors.
The first human redheads walked this earth about 50,000 years ago in Africa and then spread throughout Northern Europe. The country name of Russia means "land of reds" in honor of a redheaded Viking by the name of Rurik.
The first redheaded British monarch was a woman. Boudicca was a Celtic warrior was led her people, the Icenti, against the Romans in the C.E. 60âs.
Belief that redheads are witches is a folk belief in Germanic culture. From 1483-1784 thousands of suspected witches were nearly always stripped and searched for âmarks of the devilâ. These included any âabnormalityâ such as freckles, moles, warts, and birthmarks. Red hair was certainly considered an abnormality. Considering the freckle factor for redheads this was a deadly and shocking horror. Somewhere around 45,000 women were tortured and murdered usually by burning at the stake or by drowning.
.http://hair.lovetoknow.com/Red_Hair
Genetics of Red Hair
Part of the allure of red tresses is its rarity: red is found in less than 4 percent of natural hair colors throughout the world. The majority of redheads are concentrated along the edges of both eastern and western Europe, most notably in Scotland, England, and Ireland; countries that have become easily associated with flowing auburn and ginger tresses. In the United States, less than 2 percent of individuals have naturally red shades of hair. The exclusivity of red is due to its genetic makeup: the red chromosome for hair color is a recessive gene, meaning that an individual must inherit the gene from both parents in order to have red locks of any shade.
Redheads have other genetic traits related to their hair color. Red is found predominantly on individuals with very fair skin who are typically more sensitive to ultraviolet radiation, meaning they sunburn easily, and their hair may also need additional radiation protectants. Each individual red strand is thicker than its blonde, black, or brunette counterparts, but redheads typically have up to 30 percent fewer strands on their heads, making hair loss and thinning a potential concern.
http://en.wikipedia.org/wiki/Red_hair
red hair (also referred to as titian or ginger hair) varies from a deep burgundy through burnt orange to bright copper. It is characterized by high levels of the reddish pigment pheomelanin and relatively low levels of the dark pigment eumelanin. Approximately 1% to 2% of the human population has red hair. It occurs more frequently (between 2% and 6% of the population) in northern and western Europeans, and their descendants, and at lower frequencies throughout other parts of the world. Red hair appears in people with two copies of a recessive gene on chromosome 16 which causes a mutation in the MC1R protein. It is associated with fair skin color, lighter eye colors (gray, blue, green, and hazel), freckles, and sensitivity to ultraviolet light.
ORIGINS
Red hair is the rarest natural hair color in humans. The pale skin associated with red hair may have been advantageous in far-northern climates where sunlight is scarce. Studies by Bodmer and Cavalli-Sforza (1976) hypothesized that lighter skin pigmentation prevents rickets in colder latitudes by encouraging higher levels of Vitamin D production and also allows the individual to retain heat better than someone with darker skin. Estimates on the original occurrence of the currently active gene for red hair vary from 20,000 to 100,000 years ago. Red hair is caused by a relatively rare recessive gene, the expression of which can skip generations
http://www.purgatory.net/kornelia/1603/red_hair_facts.htm
Less than four percent of the world population has naturally red hair. That is less than two percent in America. The gene for Ginger hair was discovered in 1995 and this discovery got little attention. This is not consistent as red heads have gotten lots of it. Professor Jonathan Rees conducted a study of redheads at Edinburgh University.He identified the"gene for red hair" the melanocortin 1 receptor (MC1R), found on the 16th chromosome. He found that this single gene was responsible for red hair.
Red hair is a genetic mutation, and is seen on the heads of only four percent of people. Most of these exist in the U.K., the Republic of Ireland, and Australia. The highest percentage of natural redheads in the world is in Scotland (13%), followed closely by Ireland with 10%. In the US, about 2% of the population are natural redheads.
Red headedness is, genetically speaking, a recessive trait. It may appear after several generations of darker hair. Redheads do NOT turn grey. Red hair turned sandy, then white. They are also found to loose their color later in life than people carrying other hair colors.
The first human redheads walked this earth about 50,000 years ago in Africa and then spread throughout Northern Europe. The country name of Russia means "land of reds" in honor of a redheaded Viking by the name of Rurik.
The first redheaded British monarch was a woman. Boudicca was a Celtic warrior was led her people, the Icenti, against the Romans in the C.E. 60âs.
Belief that redheads are witches is a folk belief in Germanic culture. From 1483-1784 thousands of suspected witches were nearly always stripped and searched for âmarks of the devilâ. These included any âabnormalityâ such as freckles, moles, warts, and birthmarks. Red hair was certainly considered an abnormality. Considering the freckle factor for redheads this was a deadly and shocking horror. Somewhere around 45,000 women were tortured and murdered usually by burning at the stake or by drowning.
.http://hair.lovetoknow.com/Red_Hair
Genetics of Red Hair
Part of the allure of red tresses is its rarity: red is found in less than 4 percent of natural hair colors throughout the world. The majority of redheads are concentrated along the edges of both eastern and western Europe, most notably in Scotland, England, and Ireland; countries that have become easily associated with flowing auburn and ginger tresses. In the United States, less than 2 percent of individuals have naturally red shades of hair. The exclusivity of red is due to its genetic makeup: the red chromosome for hair color is a recessive gene, meaning that an individual must inherit the gene from both parents in order to have red locks of any shade.
Redheads have other genetic traits related to their hair color. Red is found predominantly on individuals with very fair skin who are typically more sensitive to ultraviolet radiation, meaning they sunburn easily, and their hair may also need additional radiation protectants. Each individual red strand is thicker than its blonde, black, or brunette counterparts, but redheads typically have up to 30 percent fewer strands on their heads, making hair loss and thinning a potential concern.
Multi-Colored Eyes: What Causes This?
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To start off: No, I'm not talking about one eye being green and the other blue.
I'm talking about multiple colors within the same eye.
For instance, I usually write down my eye color as Hazel. However, throughout my life it has varied between mostly hazel, grey, bluish, and now it's kind of a green shade.
Look carefully in the mirror, and I can usually see bits of each of those colors scattered in the veiny pattern of the iris. My sisters were the first to point it out to me when I was younger, meaning it's somewhat noticeable to someone looking.
And I'm glad. I think it's really cool, and it gives girls a reason to gaze into my eyes. And i'm liking it now, because I love green eyes.
So what genetically would cause this? I thought it was usually pass/fail in terms of eye color genetics, but it appears multiple traits are showing up, and I thought Green was recessive. Any thoughts?
Here's an Example. Like this, but more saturated.
http://www.daveltd.com/photo/macro/eyes/â¦
http://www.daveltd.com/photo/macro/eyes/jalene/
fixed
Answer
Genetics is not black and white. In required science class they teach you the basics. Which is usually dominant and recessive genes etc...
Coloring is determined by the MC1R protein on chromosome 4. Eumelanin is the chemical pigment that creates black and brown in our hair and skin, phaeomelanin creates red and yellow. Hair, skin and eye color are interconnected. Chromosome 16 also plays a part in determining coloring. So....your eyes are their color due to proteins in your chromosomes. You received a certain combination of certain protiens that make your eye color from your parents.
As for your eyes changing color it happens to a lot of people. I think it has to do with certain protiens losing dominaince and other reasons I really don't know. Kinda like how hair grays.
Genetics is not black and white. In required science class they teach you the basics. Which is usually dominant and recessive genes etc...
Coloring is determined by the MC1R protein on chromosome 4. Eumelanin is the chemical pigment that creates black and brown in our hair and skin, phaeomelanin creates red and yellow. Hair, skin and eye color are interconnected. Chromosome 16 also plays a part in determining coloring. So....your eyes are their color due to proteins in your chromosomes. You received a certain combination of certain protiens that make your eye color from your parents.
As for your eyes changing color it happens to a lot of people. I think it has to do with certain protiens losing dominaince and other reasons I really don't know. Kinda like how hair grays.
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Title Post: Is red hair a mutation that can happen to anyone who is Caucasian or mixed or does it have a specific origin?
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Author: Yukie
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Author: Yukie
Thanks For Coming To My Blog
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