blue eyed humans have a single common ancestor

In an article from Science Daily, a study shows that people with blue eyes all share one common ancestor. 6-10,000 years ago a genetic mutation took place which is the cause of the eye color of all blue eyed human beings alive on the planet today. Variation in eye color from brown to green comes from the amount of melanin in the iris. People with blue eyes only have a small variation in the amount of melanin in their iris. Which has drawn scientists to conclude that they all come from the same ancestor. Originally we all had brown eyes, but a mutation in the OCA2 gene in our chromosomes resulted in a switch which turned off the ability to produce melanin in the eyes.

 However, the mutation only affected the ability for the body to produce melanin in the eyes without affecting a gene adjacent to it which would have affected the body’s ability to produce melanin at all resulting in albinism. This mutation however has neither positive nor negative effects on the body and is a perfect example of nature trying new things.

Blue eyed humans have a single common ancestor

New research shows that people with blue eyes have a single, common ancestor. A group of scientists at the University of Copenhagen have found a genetic mutation which took place 6-10,000 years ago and is the cause of the eye color of all blue-eyed humans alive on the planet today. They originally said that all humans had brown eyes, but a genetic mutation affecting the OCA2 gene in our chromosomes resulted in the creation of a "switch," which literally turned off the ability to produce brown eyes. The OCA2 gene codes for the P protein, which is involved in the production of melanin. This switch  limits its action to reducing the production of melanin in the iris which is effectively "diluting" brown eyes to blue.  The mutation of brown eyes to blue represents neither a positive nor a negative mutation. It simply shows that nature is constantly shuffling the human genome, creating a genetic cocktail of human chromosomes and trying out different changes as it does so. 
Original article here
Who is correct? An article arguing with the original article

The big blue mutation

“New research shows that people with blue eyes have a single, common ancestor. A team at the University of Copenhagen have tracked down a genetic mutation which took place 6-10,000 years ago and is the cause of the eye color of all blue-eyed humans alive on the planet today.”

Researchers have found that originally we all had brown eyes. It was a genetic mutation affecting the OCA2 gene in our chromosomes that resulted in the creation of a “switch” that turned off the ability to produce brown eyes. The OCA2 gene codes for a protein which is involved in melanin production, the pigment that gives color to hair, eyes, and skin. The “switch” is located adjacent to the OCA2 gene and it limits the production of melanin. By this happening, brown eyes are essentially diluted to blue. It is believed that everyone with blue eyes has a common ancestor and that is how they all inherited the same switch at exactly the same spot in their DNA. 

Article Used: http://www.sciencedaily.com/releases/2008/01/080130170343.htm

Related Article: http://www.livescience.com/9578-common-ancestor-blue-eyes.html