DNA can provide your mugshot — Huh? Wha?

Leaving a hair at a crime scene could one day be as damning as leaving a photograph of your face. Researchers have developed a computer program that can create a crude three-dimensional model of a face from a DNA sample.

Using genes to predict eye and hair colour is relatively easy. But the complex structure of the face makes it more valuable as a forensic tool — and more difficult to connect to genetic variation, says anthropologist Mark Shriver of Pennsylvania State University…who led the work…

Shriver and his colleagues took high-resolution images of the faces of 592 people of mixed European and West African ancestry living in the United States, Brazil and Cape Verde. They used these images to create 3D models, laying a grid of more than 7,000 data points on the surface of the digital face and determining by how much particular points on a given face varied from the average: whether the nose was flatter, for instance, or the cheekbones wider. They had volunteers rate the faces on a scale of masculinity and femininity, as well as on perceived ethnicity.

Next, the authors compared the volunteers’ genomes to identify points at which the DNA differed by a single base, called a single nucleotide polymorphism (SNP). To narrow down the search, they focused on genes thought to be involved in facial development, such as those that shape the head in early embryonic development, and those that are mutated in disorders associated with features such as cleft palate. Then, taking into account the person’s sex and ancestry, they calculated the statistical likelihood that a given SNP was involved in determining a particular facial feature.

This pinpointed 24 SNPs across 20 genes that were significantly associated with facial shape. A computer program the team developed using the data can turn a DNA sequence from an unknown individual into a predictive 3D facial model…Shriver says that the group is now trying to integrate more people and genes, and look at additional traits, such as hair texture and sex-specific differences…

At the moment, such genetic analyses are limited, imprecise. If you think scientists will leave it alone you don’t understand curiosity. If you think someone like the FBI or any other Alphabetoid snoop will leave it alone you don’t understand paranoia.

One thought on “DNA can provide your mugshot — Huh? Wha?

  1. Gumshoe says:

    Once upon a time… see history of fingerprinting [http://en.wikipedia.org/wiki/Fingerprinting#Europe_in_the_17th_and_18th_centuries], also Alphonse Bertillon [http://en.wikipedia.org/wiki/Alphonse_Bertillon]

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.