"When analysing the haplogroup frequencies in specific populations it doesn't always spring to mind that two populations with similar frequencies can look very different because of the way the "genetic elements" were mixed. Genetics is like cooking; you can make a lot of very different dishes with the same basic ingredients. A pancake, a French toast, a waffle, and scrambled eggs on a piece of bread are all derived from the same ingredients : eggs, milk and flour (with more or less water and sugar). "