Naked Science Forum
Life Sciences => Physiology & Medicine => Topic started by: thedoc on 20/11/2014 16:30:02
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Jule Eberle asked the Naked Scientists:
I have multicolored hair, always have, from a very light blond to a blond to a reddish, to kind of a reddish brown at the back of my neck. When I braid my hair It is beautiful as each strand definitions colors, my eye lashes are the same which is a pain in the butt...they go from dark to very light, they are long but you cannot tell...I am now 54 and my hair is almost the same with a few changes...but has been this way since I noticed it at aged nine. People have always asked me how I dye my hair and I have always had to show them that I don't...so i'm one calico...or tortoise that is actually true to be and alive and well.
What do you think?
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Different colours = Heterochromia .
Heterochromia of the scalp hair ...
(https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Fwww.cmaj.ca%2Fcontent%2F182%2F18%2FE862%2FF1.medium.gif&hash=ef755227b3975adc6b6c52852711f908)
Heterochromia of the hair is described as the growth of hair with two distinct colours in the same person. When the distribution of the different-coloured hair is symmetric (e.g., lighter hair on the underarms, a red moustache on a person with otherwise brown hair), heterochromia of the hair is often physiologic. However, when heterochromia is asymmetrically distributed, it reflects a pigmentation disorder, which may have a genetic basis.
http://www.cmaj.ca/content/182/18/E862.full.html
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Having looked at dogs, cats, tigers, zebras.... one wonders instead why apes tend to be monochromatic!
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I'm not sure why, but it appears that men's facial hair is particularly heterochromic. I have brown hair, and while my beard is mostly brown, it has hairs all the way from platinum blonde to black, with a few bright red ones here and there... go figure!
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Having looked at dogs, cats, tigers, zebras.... one wonders instead why apes tend to be monochromatic!
This one is not happy about being a bit ginger [:)] ...
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Occasionally tabby humans too ...
(https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Fwww.thenakedscientists.com%2Fforum%2Findex.php%3Faction%3Ddlattach%3Btopic%3D46772.0%3Battach%3D17462%3Bimage&hash=40f1d2616865edb2948f86b63c39e6d5)
http://dermatlas.med.jhmi.edu/image/epidermal_nevus_syndrome_4_080216