One is "I have Scottish blood" or "I have Scottish DNA" when in reality there is no such thing as Scottish DNA or Irish DNA or blood, it is more a figure of speech. The British Isles is a mixture of people from all over Europe. Yes it is Irish ancestry and Scottish, Welsh ancestry but blood is blood.
It is a DNA that has been found more commonly in a certain country due to certain waves of immigration.
It is a DNA that has been found more commonly in a certain country due to certain waves of immigration.