low copy dna

[Katoninelive]

can you tell the colour of a persons eyes through their dna?

[theprof]

Not with 100% accuracy. Gene technology at the moment can classify someone into one of three eye-colour groups - light (blue and grey), dark (black and brown), or hazel. The accuracy is around 97% but sometimes other factors are involved which seriously hinder accurate analysis.

[Katoninelive]

thankyou theprof. so if you have blue eyes this would be reconised?

[theprof]

Not quite Katoninelive. You could only say for certain that the eyes would be blue, grey or shades in between.
You could exclude black, brown, hazel and their variants with a reasonable amount of certainty.
However, there are circumstances in which this type of DNA analysis is inconclusive so for forensic purposes, you still couldn't be 100% positive as to the eye colour or shade. This is the reason why eye colour is of little value in forensic science.