How do you 'get' mitochondrial disease?

Just to be clear I am not a doctor. I am a parent and patient with mitochondrial disease. I list the resources from where I got the following information at the end of the post. To the best of my knowledge and current medical knowledge this is how mitochondrial disease is passed along through families.

 

-You can get it through your mother's genetics. Your mother passes down the mtDNA and mtRNA for the mitochondrial organelle.
-You can get it through the genetic passage dominant DNA or recessive DNA a combination of both parents.
-You can get it through a spontaneous mutation when the sperm and egg first met and began to form a baby.
-There are also rare cases of medication so deeply affected a person it causes a medication version of mitochondrial disease.
Here is a good lesson on DNA.
http://ghr.nlm.nih.gov/handbook/basics/dna

Sources: http://www.mitocanada.org/about-mitochondrial-disease/how-do-you-get-mitochondrial-disease/
www.umdf.org (mito 101 pdf)
www.mitoaction.org (about mito section)