There are various genetic types, but red hair is most commonly caused by two copies of a recessive allele on chromosome 16. This produces a particular protein responsible for the pigment pheomelanin, which causes red hair.
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With light, the primary colours are green, blue and red.
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In the paintbox the primary colours are red, blue and yellow
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most remarkable scientist of them all
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In the Hebrew tradition, the first man was moulded from red earth, i.e. earthenware clay. The root of the Hebrew word for Adam actually means ‘red’ and it is also related to the word ‘dam’, which means ‘blood’, so A-dam means ‘of blood’.