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Scientists Can Predict Eye Color by Simple DNA Analysis
Human eye colour, which is determined by the extent and type of pigmentation on the eye's iris, is what geneticists call a 'complex trait'. This means that several genes control, which colour the eyes, will ultimately have.
Over the past decades a number of such 'eye-colour genes' have been identified, and people with different eye colour, will have a different DNA sequence at certain points in these genes.
Such differences are known as single nucleotide polymorphisms (SNPs).
The researchers analysed the DNA of over 6000 Dutch people whose eye colour had been scored. They determined the sequence at 37 SNPs in 8 eye colour genes for each of these and found that the eye colour of a given individual can be predicted with over 90 percent confidence already with the best 6 SNPs from 6 genes, as long as the persons's eyes are blue or brown.
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