What percentage of americans have blue eyes

Which is the percentage of the American population to the eyes bl…?

http://answers.yahoo.com/question/index?qid=20091009110839AAmyNpz

Blue eyes, I didn’t even know the %, I learn something new everyday. I couldn’t find anything on green eyes. “About half of Americans born at the turn of the 20th century had blue eyes, according to a 2002 Loyola University study in Ch…

Why do Americans believe Hitler only wanted Blonde Blue eyed ligh…?

http://answers.yahoo.com/question/index?qid=20090619094823AA62aGy

Youre Confused a bit, the whole “Aryan race” idea is just a concept, Hitler believed that Nordic people from Sweden and Norway with predominately blue eyes blond hair pale skin and a fair face, Nordic peoples have smaller upper li…

Do african americans (blacks) ever have blue eyes?

http://www.answerbag.com/q_view/1083197

yes, its a recessive gene so its not very common

Related Questions Answered on Y!Answers

what percentage of caucasian americans have brown eyes? blue eyes? green eyes?

Q:

A: look it up

Which is the percentage of the American population to the eyes blue and the green eyes?

Q:

A: An ESTIMATED 7% of the U.S. population has either blue eyes, green eyes or a combination of the two.

What color are my eyes? Easy 10pts!?

Q: What color are my eyes? Because many people have said different things.http://i291.photobucket.com/albums/ll307/dallasroberson2490/012-2-1-1.jpghttp://i291.photobucket.com/albums/ll307/dallasroberson2490/061-2-1-1.jpghttp://i291.photobucket.com/albums/ll307/dallasroberson2490/dallas031-1-3.jpgthese are the choices:Amber:Amber eyes are of a solid color and have a strong yellowish/golden and russet/coppery tint. This might be due to the deposition of the yellow pigment called “lipochrome” in the iris (which is also found in green and violet eyes). Amber eyes should not be confused with hazel eyes; although hazel eyes may contain specks of amber or gold, they usually tend to comprise many other colors, including green, brown and orange. Also, hazel eyes may appear to shift in color and consist of flecks and ripples; while amber eyes are of a solid gold hue.The eyes of some pigeons contain yellow fluorescing pigments known as pteridines.The bright yellow eyes of the Great Horned Owl are thought to be due to the presence of the pteridine pigment xanthopterin within certain chromatophores (called xanthophores) located in the iris stroma.In humans, yellowish specks or patches are thought to be due to the pigment lipofuscin, also known as lipochrome.Blue:Blue eyes contain low amounts of melanin within the iris stroma; longer wavelengths of light tend to be absorbed by the underlying iris pigment epithelium, and shorter wavelengths are reflected and undergo Rayleigh scattering.The type of melanin present is eumelanin.The inheritance pattern followed by blue eyes is considered similar to that of a recessive trait, however it is a polygenic trait (meaning that it is controlled by the interactions of several genes, not just one).Eiberg and colleagues showed in a study published in Human Genetics that a mutation in the 86th intron of the HERC2 gene, which is hypothesized to interact with the OCA2 gene promoter, reduced expression of OCA2 with subsequent reduction in melanin production.The authors concluded that the mutation may have arisen in a single individual in the Near East or around the Black Sea region 6,000-10,000 years ago during the neolithic revolution,perhaps suggesting that all people with pure blue eyes are more closely related. However, blue eyes with brown spots around the pupil are not related to this mutation., they are also found in part of North Africa, West Asia and South Asia in particular the northern areas. However blue eyes are not found within the population of East Asia, due to the major pre-dominance of the brown eye gene in the area. A 2002 study found the prevalence of blue eye color among Caucasians in the United States to be 33.8 percent for those born from 1936 through 1951 compared with 57.4 percent for those born from 1899 through 1905.Blue eyes have become increasingly rare among American children with only 1 out of every 6 – 16.6 percent which is 49.8 million out of 300 million (22.4% of white Americans) of the total United States population having blue eyes.The plunge in the past few decades has taken place at a remarkable rate. A century ago, 80 percent of people married within their ethnic group. Blue eyes, a genetically recessive trait, were routinely passed down, especially among people of English, Irish, and Northern European ancestry.In the 1930s, eugenicists used the disappearance of blue eyes as a rallying cry to support immigration restrictions. They went so far as to map the parts of the country with the highest and lowest percentage of blue-eyed people.The outer surface of the iris of a blue eyed person is actually clear, lacking the outer layer of pigmentation that is found in brown eyes. Their color is caused by the inner layer of pigmentation and the semi-opaque fibrous tissues which lay between the two layers. Brown:Brown eyes are predominant in humansand, in most populations and countries, it is (with few exceptions) the only iris color present.It is less common in countries around the Baltic Sea and in Scandinavia. Dark pigment of brown eyes are most common and with a few exceptions the only color among the population of East Asia.In humans, brown eyes contain large amounts of melanin within the iris stroma, which serves to absorb light at both shorter and longer wavelengths. Brown eyes are the most common eye color, with over half of the world’s population having them (Including hazel and amber eyes the ratio can reach over 90%).Gray:Gray eyes have less melanin than blue eyes,even though they are considered a darker shade of blue (like blue-green). Gray eyes are most common in European Russia, Finland and the Baltic States. Under magnification, gray eyes exhibit small amounts of yellow and brown color in the iris. Ultimately there are at least two things that could determine gray eye color. The first is the amount of melanin made. And the second is the density of the proteins in the stroma.A gray iris maSorry, I ran out of characters, here is where it cut off:may indicate the presence of a uveitis. However, other visual signs make a uveitis obvious. Gray iris color, as well as blue, are at increased risk of uveal melanoma.Visually, gray eyes often tend to appear to change between the shades of blue, green and gray; this is because gray eyes are extremely light, as mentioned before. The color change for gray eyes is usually influenced by the lighting and the colors in the surroundings (such as clothes, makeup, etc.).Green:Green eyes are the product of low to moderate amounts of melanin and fatty acids and probably represent the interaction of multiple variants within the OCA2 and in other genes, including perhaps the red-hair gene.They are most common in Northern Europe and Central Europe.It can sometimes be found in part of West Asia, South Asia.Definitions of the eye color “hazel” vary: it is sometimes considered to be synonymous with light-brown and gold. Thanks!

A: Hazel..