d)Why do different persons have different
hair colour(black, brown, white)?
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Hair color is the pigmentation of hair follicles due to two types of melanin: eumelanin and pheomelanin. ... Levels of melanin can vary over time causing a person's hair color to change, and it is possible to have hair follicles of more than one color on the same person........✌
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Hair color is determined by two types of pigment, eumelanins and pheomelanins, which together produce all the natural hair colors seen in humans. (“Melanin” is the basic term for any pigment, or coloring, in the hair or skin.) Pheomelanins produces the color red, and eumelanins can produce either black or brown pigments.
Eumelanins determine how dark or light the hair will be. A person who produces very little brown eumelanin will have blond hair. Low concentrations of black eumelanin will result in gray hair. Lots of black or brown eumelanin will result in darker hair.
Everyone has some pheomelanins (reddish) coloring in their hair as well. A person with true red hair will produce a high concentration of pheomelanins
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