Ancestry

Why does the sum of the ethnic breakdown percentages not add up to 100%?

Why am I not assigned to a specific ethnicity in the report?

My ancestry results are different from the ancestry results I got from another company.

My ancestry composition is different from my sibling's. Why is it so?

My ancestry composition results turned out differently than what I expected.

I had a stem cell transplant. Can I still use the ancestry service?

I had a bone marrow transplant. Can I still use the ancestry service?

What is ancestry service, and what can I learn from the reports?