Wait a minute. What happens if you have one black parent and one white parent? Do you still get 5/3 of a vote? Or do you get the average of 5/3 and 1 (4/3 of a vote)?
Now suppose you had one black grandparent, one native American grandparent, and two white grandparents? This could get mighty complicated mighty fast.
This means that GEORGE ZIMMERMAN gets preference. Yes, that George Zimmerman.