How Accurate are Mail-in DNA Tests?

The video discusses the inconsistencies in DNA testing results, even among identical twins, due to errors in replication processes and differences in genetic databases used by companies. It highlights that DNA tests only analyze specific parts of DNA and are prone to errors, leading to varying results. The video also emphasizes that these tests provide genetic information, not definitive ancestry, and are full of gaps.

What are some reasons identical twins might receive different DNA test results?

Why might a person not learn much about their ancestry from a DNA test?

How do DNA testing companies determine the geographic origins of a person's DNA?

What factors contribute to the inaccuracies in DNA testing results?

What limitations do DNA testing services have in terms of the data they provide?