I think it's reasonable to ask for a Native American preset in the CC (and arguing that it would be impossible because they'd need a preset for every tribe of Native Americans is ridiculous. That would be like saying you need an individual preset for French, German, Danish, Swedish, Irish, etc..). Seriously, the game wouldn't suffer if instead of all the extra variations of Caucasian, they made a Hispanic/Latino/Spanish, Native American, White/Caucasion, Black/African American, Asian, South Asian, and Pacific Islander preset.
Also, some of you (I WON'T SAY WHO) need to go back and read up on biology, because you don't seem to have a very good grasp of genetics. I'm no expert, but from what I know they're a lot more complicated than just 'dominant genes win out'. For example, black haired, brown eyed parents can have blonde haired, blue eyed babies if they both have ancestors with blonde hair and blue eyes. A recessive allele can be propagated through any number of generations without observing the phenotype, depending on a number of factors. So even IF the human race somehow lost ethnicity in the future through inter-racial marrying (yes, lore-wise that's been established, but that doesn't mean it's realistic) it's improbable that recessive genes would be completely wiped out.