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Wednesday, July 21, 2004 5:36:05 PM
http://www.telegraph.co.uk/connected/main.jhtml?xml=/connected/2004/06/23/ecndna22.xml&sSheet=/c...
DNA left at crime scene will reveal skin colour
By Roger Highfield, Science Editor
(Filed: 22/06/2004)
Scientists have found a way to tell the eye and skin colour of a suspect from the DNA left at the scene of a crime, they report today.
They will soon be able to help police even further by using the same technology to predict hair colour.
The colour of eyes is influenced by the interaction of several genes, according to the study published in the journal Trends in Genetics by Dr Richard Sturm of Queensland University and Dr Tony Frudakis of the company Dnaprint Genomics, Florida.
Using special markers called AIMs that can identify the genetic differences between different populations they have identified the DNA sequences that explain most of the variations in eye colour in Europeans.
"Aside from the Forensic Science Service in Britain, which has a red hair test, there are no other genetic tests for physical characteristics commercially available yet," said Dr Sturm.
The research also questions the wisdom of many school biology textbooks.
Children are usually taught that brown is dominant, so if one parent has brown eyes so does their offspring, while two blue-eyed parents always have a blue-eyed child.
But the team found that, though uncommon, blue-eyed parents can have children with brown eyes. "This is because eye colour is determined by several interacting genes," said Dr Sturm.
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