Will what people have been told by the DNA testing companies (like FamilyTreeDNA and 23andMe) still be valid? Lots of people have been tested and told that they belong to a certain haplogroup, like H (45% of Europeans, I believe). If the latest report is correct, does that mean they are all in the group they were told they belong to, but that in a few cases the mtDNA was inherited from a paternal ancestor? Or could there be a case of someone inheriting mtDNA from both parents?
Gregor Mendel, what a fine mess you have gotten us into!