Will my mitochondrial DNA (mtDNA) results show me admixture percentages for ancestry from different lines?

No, because mitochondrial DNA (mtDNA) is inherited exclusively from your direct maternal line, it does not show admixture from your other lines. That is, [...]

How common is mtDNA heteroplasmy?

All mitochondrial DNA (mtDNA) mutations go through a state of heteroplasmy. The frequency of heteroplasmy is then equal to or greater than mtDNA mutation [...]

How is mtDNA heteroplasmy inherited?

In each generation, it is possible for the child to inherit the heteroplasmic genome, only the ancestral genome, or only the descendant genome. For [...]

How do mitochondrial mutations occur?

Every human cell contains hundreds of mitochondria. Each mitochondrion in a cell contains multiple copies of its own DNA (mtDNA). A new mitochondrial mutation [...]

Where can I share information with others who have mtDNA tested?

There is an mtDNA section in Family Tree DNA’s Forums.

How do I use mtDNA (mitochondrial DNA) to help with my recent genealogy?

To find connections in recent times, it is necessary to find and test multiple people who have suspected shared ancestry. You can do this [...]