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How rare are true blondes?

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.

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They say blondes have more fun, but true blonde hair is rarer than you might think, according to a new study conducted by researchers from the University of Edinburgh’s MRC Human Genetics Unit. The research, published in the journal Nature Communications, is the largest genetic hair study of its kind as the researchers examined DNA from nearly 35,000 men and women of European descent. The DNA data came from the UK Biobank Study and the researchers conducted genome-wide analyses of different hair colors to find any genetic variants. For example, although most redheads have two copies of the MC1R gene, there are people with two versions of this gene that don’t have red hair. The researchers wanted to find out what other underlying genetic factors drive hair color variation. The researchers found eight genetic variants linked to red hair and nearly 200 genetic differences in blondes and brunettes. The lighter your hair is, the more genetic variants you have, according to the study. 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. “In summary, the very large dataset provided by UK Biobank has enabled us to dissect the complex genetic nature of hair colour,” the researchers concluded. “This forms the foundation for functional analysis linking genetic variation to phenotype and exploring the cellular interactions between melanocytes and other cells in the hair follicle.”

By Kay Vandette, Earth.com Staff Writer

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Why are my eyes naturally purple?

While rare, purple or violet eyes can naturally occur, due to a mutation, inflammation inside the eye, or a condition called albinism.

What is Alexandria’s genesis?

Alexandria syndrome, also called Alexandria's genesis, is a medical myth that can cause a person to develop purple eyes, among other symptoms. This mutation is said to affect Caucasians more frequently, but other children could be affected if they inherit it from multiple genes. There is no scientific evidence to support the symptoms described here, but based on historical theories people with Alexandria syndrome are said to have:

Perfect vision

Very light skin (which surprisingly does not burn with exposure to the sun)

Dark brown hair although they have no body hair

Women with this condition do not menstruate, but are fertile and can bear children People with this condition have an extremely powerful immune system; they are rarely afflicted with any disease It is thought that people with such characteristics have a well-balanced metabolism, which keeps them from becoming obese

Life expectancy may range between 120-150 years

There is no evidence, however, to support a diagnosis of Alexandria syndrome. Although a variety of disorders can cause a person's eye color to change, none have been linked to improved physical abilities.

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