DNA Test – Turning Brown Eyes Blue

Analysing DNA can help uncover our ancestry, and a simple DNA test can provide clues on the genetics of eye colour.

According to genetic scientists who undertook a series of DNA tests on the colour of our eyes, those of us with blue eyes are not strictly speaking, normal. Scientists say that brown is the default colour for our eyes and the blue is a result of a mutation in our genes. DNA tests were carried out by scientists on volunteers. The DNA test results revealed that 99.5% of the blue-eyed people that volunteered had the same small mutation in the gene that determines the colour of the iris.

DNA Test – It’s In The Genes

The DNA tests show that everyone who has blue eyes can trace their ancestry back to just one person. It’s thought this ancestor is from the Black Sea region and lived about 10,000 years ago. The fact that all the volunteers who had the DNA test had the same mutation in their genes points to the fact blue eyes are accountable to just one ancestor who passed on his gene to all the subsequent people currently alive with blue eyes in the world. It’s an astonishing thought, but a DNA test can reveal the secrets of our ancestry as well as highlight how interconnected the human race is, in all its diversity.

DNA Test Reveals Mutation

The study into blue eyes was headed by Professor Hans Eiberg at the University of Copenhagen, where he and his colleagues conducted the DNA test on volunteers. Although the specifics of the time of the mutation are unsure, the scientists say it probably occurred around 10,000 years ago as humans expanded into Europe. The researchers were quoted in the journal Human Genetics: “The mutations responsible for blue eye colour most likely originate from the north-west part of the Black Sea region, where the great agricultural migration of the northern part of Europe took place in the Neolithic periods about 6,000 to 10,000 years ago.”

Turning Brown Eyes Blue

According to the DNA test, brown is the normal colour for eyes, but the mutation in the gene OCA2 meant disrupted melanin production in the iris turned the eye blue. The DNA test revealed that it didn’t matter if you were fair skinned and Scandinavian or dark and from the Middle East, blue eyes shared the same DNA sequence in the OCA2 gene. “This to me indicates very strongly that there must have been a single, common ancestor of all these people,” Professor Eiberg said.

Speak To International Bioscience About a DNA Test

International Biosciences offer a broad range of DNA Test services designed to provide indisputable answers to emotional questions. Whether you seek to establish paternity, prove siblingship or research genealogy, for legal definition or peace of mind, we are able to provide the appropriate DNA test at competitive rates, professionally and confidentially. Using state of the art technology we are able to provide conclusive evidence on time, every time. Contact International Biosciences on 01342 850945 or click here to email us.

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