However , other studies hold that paternal mtDNA is never transmitted to offspring , which would validate the use of mTDNA testing for genealogy .
Some authors cite paternal mtDNA transmission as invalidating mtDNA testing .
Other studies hold that paternal mtDNA is never transmitted to offspring , which would validate the use of mTDNA testing for genealogy .
Some authors cite paternal mtDNA transmission as invalidating mtDNA testing .