Forensic Testing can be used to determine a suspects eye and hair colour, scientists say, to an 85% degree of accuracy using only the smallest amount of DNA. The Hirisplex system, as it's referred to, can determine this with as little as 6 DNA Markers.
Below is quoted material directly from a published report:
"Prof Kayser, from Erasmus University Medical Center in Rotterdam, the Netherlands, said: "The test is very sensitive and produces complete results on even smaller DNA amounts than usually used for forensic DNA profiling."
An important current approach, known as genetic profiling, involves comparing crime scene DNA with that from a suspect or with a profile stored in a database.
But this relies on the person either being among a pool of suspects identified by the police or having their profile in a DNA database.
Tools such as Hirisplex could be useful in those cases where the perpetrator is completely unknown to the authorities, said Prof Manfred Kayser, who led the study.
He said the test "includes the 24 currently best eye and hair colour predictive DNA markers. In its design we took care that the test can cope with the challenges of forensic DNA analysis such as low amounts of material."
The Article Continued with:
"The test system includes the six DNA markers previously used in a test for eye colour known as Irisplex, combining them with predictive markers for hair.
In the study, the authors used Hirisplex to predict hair colour phenotypes in a sample drawn from three European populations.
On average, their prediction accuracy was 69.5% for blonde hair, 78.5% for brown, 80% for red and 87.5% for black hair colour.
Analysis on worldwide DNA samples suggested the results were similar regardless of a person's geographic ancestry.
The team was also able to determine, with a prediction accuracy of about 86%, whether a brown-eyed, black haired person was of non-European versus European origin (excluding some nearby areas such as the Middle East).
The findings were also outlined at the sixth European Academy of Forensic Science conference in The Hague this week."
So, my question is, why haven't the lovely people over at that great agency called San Francisco Police Dpt. used the sample they have, partial as it may be is likely enough for this type of testing, and submitted it for this specific type of test.
No, this cannot and will not tell you who the Zodiac is, but it can and will help tell you who He is not!
Below is quoted material directly from a published report:
"Prof Kayser, from Erasmus University Medical Center in Rotterdam, the Netherlands, said: "The test is very sensitive and produces complete results on even smaller DNA amounts than usually used for forensic DNA profiling."
An important current approach, known as genetic profiling, involves comparing crime scene DNA with that from a suspect or with a profile stored in a database.
But this relies on the person either being among a pool of suspects identified by the police or having their profile in a DNA database.
Tools such as Hirisplex could be useful in those cases where the perpetrator is completely unknown to the authorities, said Prof Manfred Kayser, who led the study.
He said the test "includes the 24 currently best eye and hair colour predictive DNA markers. In its design we took care that the test can cope with the challenges of forensic DNA analysis such as low amounts of material."
The Article Continued with:
"The test system includes the six DNA markers previously used in a test for eye colour known as Irisplex, combining them with predictive markers for hair.
In the study, the authors used Hirisplex to predict hair colour phenotypes in a sample drawn from three European populations.
On average, their prediction accuracy was 69.5% for blonde hair, 78.5% for brown, 80% for red and 87.5% for black hair colour.
Analysis on worldwide DNA samples suggested the results were similar regardless of a person's geographic ancestry.
The team was also able to determine, with a prediction accuracy of about 86%, whether a brown-eyed, black haired person was of non-European versus European origin (excluding some nearby areas such as the Middle East).
The findings were also outlined at the sixth European Academy of Forensic Science conference in The Hague this week."
So, my question is, why haven't the lovely people over at that great agency called San Francisco Police Dpt. used the sample they have, partial as it may be is likely enough for this type of testing, and submitted it for this specific type of test.
No, this cannot and will not tell you who the Zodiac is, but it can and will help tell you who He is not!
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