Answered
In Biology
Why are mitochondrial genetic disorders inherited only from the mother?
Because all the mitochondria come from mom. All the mitochondria in your body cells came from mom's single egg. Even though sperm do have mitochondria, they don't make it into… the egg. Only the tip of the sperm--containing the DNA--penetrates the egg's cell membrane. The sperm's mitochondria are in the tail, which never enters the egg's cytoplasm. I have heard of one case where a guy supposedly had evidence of carrying some mitochondria from his father, but I've never seen it documented. I can see how it is possible, but until I see it documented I'd consider it hearsay. (MORE)
