SOUTH PARK PREDICTIVE PROGRAMMING ~DNA AND ME

Companies can only compare your genetic makeup with existing databases of people who have done genetic testing. The percentages that turn up in the test results like 7% from the Northern Indian subcontinent will create a misleading result.

They only show how the specific database and the specific company's comparison algorithm exactly divide up your 100 points of identity. That's like having a screen shot of a video of my face and stating the precise percentage of different color pixels you need to reproduce that screenshot.

You could have an exact number describing a rough approximation of only one factor of what I look like.

What's not always obvious from these reports is that they're based on estimates that can vary from one company to another.