Scientists studying the Y chromosomes of hundreds of Scottish males have discovered the rate of a key Celtic marker dating back to 6th Century Ireland is more than twice as common in the DNA of men in Glasgow and the west than Edinburgh and the east.

Here award-winning cartoonist Steven Camley reflects on the story.

The caption reads, "The DNA test says you're not Jock Tamson's bairn."

To see more of Steven Camley's cartoons or to buy, go here.