"The traces of Native American DNA in your test may be too small to detect. Let's look at why.
If your great-great-grandmother was ¼ Cherokee, then it was her grandparent that was 100% Native American. And that would be your 4th-great-grandparent. Now your great-great-grandmother would get 50% of her DNA from her mother and 50% from her father. To make this easy, let's divide by 2 for every generation.
So how much of your great-great-grandmother's DNA are you likely to have? Probably around 1.5625%! And that may not be enough to detect Native American ethnicity."
That makes since
I would only have between 1-3% of chickasaw in me.