Simplify the following text for a Grade 11 native English-speaking person.
Original: The term genome can be applied specifically to mean the complete set of nuclear DNA ( the ` nuclear genome ' ) but can also be used of organelles that contain their own DNA , as with the mitochondrial genome or the chloroplast genome .
Simplified: The term genome can be applied specifically to mean that stored on a complete set of nuclear DNA ( i.e. , the `` nuclear genome '' ) but can also be applied to that stored within organelles that contain their own DNA , as with the `` mitochondrial genome '' or the `` chloroplast genome '' .