Ever made a character in which you want to display both aspects of their ethnicity? Technically everyone's mixed in some way, but let me make an example. Let's say your character's mother was Slavic, but their father was Thai. They might look more like their paternal parent with darker melanin being more dominant, but they would also likely look very different from the average Thai. Does this make sense?
I've sometimes felt like, one or the other doesn't justify it. Having 'Mixed' heritage would be very useful for certain characters, I think. Considering ethnicity actually matters when you look at a corpse, it should be a proper representation.
