Mitochondria are possessed by both men and women. They are transmitted integrally by a mother to her children mitochondrial DNA. However, only her daughters once become mothers pass it on to their children. A mtDNA signature therefore follows the direct lineage of the mothers down to us.
For rigorous work it is necessary to order a test covering the 16,569 base pairs that make up our mitochondria.
I can order this test for you, share the results and provide an interpretation.