Pashtun Community | Pashtuns | Pashto |
World's Largest Online Pashtun Community

Go Back   Pashtun Community | Pashtuns | Pashto | > Profession & Science > Science - پوهنه
Reload this Page Forensic test can predict hair and eye colour from DNA
User Tag List

Reply
 
Thread Tools Display Modes
(#1)
Old
din din is offline
PF senior
din is on a distinguished road
 
Posts: 6,340
Thanks: 1,134
Thanked 936 Times in 697 Posts
My Mood: Happy
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Join Date: Apr 2010
Default Forensic test can predict hair and eye colour from DNA - 08-25-2012, 04:37 AM

24 August 2012 Last updated at 08:42 ET Share this page


Forensic test can predict hair and eye colour from DNA

By Paul Rincon Science editor, BBC News website The test can predict both hair and eye colour from samples left at a crime scene
Continue reading the main story Related Stories


Scientists have developed a forensic test that can predict both the hair and eye colour of a possible suspect using DNA left at a crime scene.
The team that developed the test says it could provide valuable leads in cases where perpetrators cannot be identified through DNA profiling.
The Hirisplex system could allow investigators to narrow down a large group of possible suspects.
Details appear in the journal Forensic Science International: Genetics.
Predicting phenotypes - outward traits such as hair colour or eye colour - from DNA information is an emerging field in forensics.
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."
Prof Kayser, from Erasmus University Medical Center in Rotterdam, the Netherlands, added: "The test is very sensitive and produces complete results on even smaller DNA amounts than usually used for forensic DNA profiling."
He told BBC News that the journal article described everything needed to establish the test in a forensic lab, but that the team was also in touch with industry regarding their knowledge about hair and eye colour prediction.
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.
Reply With Quote
(#2)
Old
CrescentMoon CrescentMoon is offline
PF newbie
CrescentMoon is on a distinguished road
 
Posts: 9
Thanks: 5
Thanked 3 Times in 3 Posts
My Mood: Cold
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Join Date: Sep 2012
Location: Canada
Default 09-12-2012, 10:06 AM

That's interesting, but now there's something else where a doctor found out how to remove the pigment out of " brown eyes " and create them into blue eyes within 90 seconds through a laser. It costs about 5000 $ , and he will do a year of more research before it is released to the public. Oh boy, if I were a fugitive, it would come in handy.
Reply With Quote
Reply

Tags
colour, dna, eye, forensic, hair, predict, test

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off




Learn Pashto Online| Afghan Wiki| TheHujra.com| Pukhtoogle| Afghanvoice.com| Khyber.org| Pukhto.net| Tor_Khan's blog| Abdul Rahman Karim's blog| Voices of the Pashtun land| Pashto TV

User Alert System provided by Advanced User Tagging v3.0.6 (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
No part of this site may be copied without permission of the administration. The views, posts, opinions and threads expressed by members of the community here are not necessarily those of the staff and management of Pashtun Forums.