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Why is medieval Christian art so different from modern art?
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[QUOTE]Originally posted by Mike111: [QB] cassiterides - Ha Ha Ha, damn you're Stupid! Even PROVIDING the link - Ha ha ha. Wiki Red hair Red hair occurs on approximately 1–2% of the human population. It occurs more frequently (2–6%) in people of northern or western European ancestry, and less frequently in other populations. Red hair appears in people with two copies of a [b]recessive[/b] gene on chromosome 16 which causes a mutation in the MC1R protein. [b]recessive[/b] In another example, coat color in siamese cats and related breeds is determined by a series of alleles at the [b]albino gene locus[/b] that produce different levels of pigment and hence different levels of color dilution [b]MC1R[/b] MC1R is one of the key proteins involved in regulating mammalian skin and hair color. It is located on the plasma membrane of specialized cells known as melanocytes, which produce the pigment melanin through a process referred to as melanogenesis. It works by controlling the type of melanin being produced and its activation causes the melanocyte to switch from generating the yellow or red phaeomelanin by default to the brown or black eumelanin in replacement. Many genetic changes in the MC1R gene increase the risk of developing skin cancer, including a common, serious form of skin cancer that begins in melanocytes (melanoma). Alterations in the MC1R gene disrupt the ability of the melanocortin 1 receptor to trigger eumelanin production in melanocytes. Because eumelanin normally protects skin from the harmful effects of UV radiation, a lack of this pigment leaves fair skin more vulnerable to damage from sun exposure. Skin damage caused by UV radiation from the sun is a major risk factor for developing melanoma and other forms of skin cancer. Red 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. The term redhead (originally redd hede) has been in use since at least 1510. It is associated with fair skin color, lighter eye colors (gray, blue, green, and hazel), freckles, and sensitivity to ultraviolet light. [b]Oculocutaneous albinism, type 2[/b] Tyrosinase-positive oculocutaneous albinism (OCA, type II) is an autosomal recessive disorder in which the biosynthesis of melanin pigment is reduced in skin, hair, and eyes. Although affected infants may appear at birth to have OCA type I, or complete absence of melanin pigment, most patients with OCA type II acquire small amounts of pigment with age. Individuals with OCA type II have the characteristic visual anomalies associated with albinism, including decreased acuity and nystagmus, which are usually less severe than in OCA type I. OCA type II is the most common type of oculocutaneous albinism in the world. The gene OCA2, when in a variant form, the gene causes the pink eye color and hypopigmentation common in human albinism. Different SNPs within OCA2 are strongly associated with blue and green eyes. Hair color is the pigmentation of hair follicles due to two types of melanin, eumelanin and pheomelanin. Generally, if more melanin is present, the color of the hair is darker; if less melanin is present, the hair is lighter. Blond hair can have almost any proportion of phaeomelanin and eumelanin, but both only in small amounts. More phaeomelanin creates a more golden blond color, and more eumelanin creates an ash blond. Blond hair is common in many European peoples, but rare among peoples of non-European origin. Many children born with blond hair develop darker hair as they age. Red hair ranges from vivid strawberry shades to deep auburn and burgundy, and is the rarest fully distinct hair color on earth. It is caused by a variation in the Mc1r gene and believed to be recessive. Red hair has the highest amounts of phaeomelanin and usually low levels of eumelanin, and is the rarest natural human hair color. [b]REDHEADED ALBINO WITH MAKEUP ON - IMAGINE WHAT SHE LOOKS LIKE WITHOUT HER MAKEUP. [IMG]http://upload.wikimedia.org/wikipedia/commons/thumb/0/03/Woman_redhead_natural_portrait_1.jpg/727px-Woman_redhead_natural_portrait_1.jpg[/IMG] He, he, he, WELL WONDER NO MORE! [IMG]http://photos.modelmayhem.com/photos/080904/14/48c02ea05c81f.jpg[/IMG] [IMG]http://farm1.static.flickr.com/73/159597901_b20cfa327e_z.jpg[/IMG] [IMG]http://a0.img.mobypicture.com/a8cab699e55580b517e613094ea8cc8b_view.jpg[/IMG] [IMG]http://3.bp.blogspot.com/_LTuiqn_j6sM/TJxkztb-veI/AAAAAAAAAn4/isQqb6A5lXM/s400/face.jpg[/IMG] SOMETIMES MAKEUP DOESN'T HELP.[/b] [IMG]http://www.dailymakeover.com/appImages/galleryImages/celebrity_hairstyles_ladies/Tilda_Swinton+Feb_24_2008.jpg[/IMG] [/QB][/QUOTE]
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