Here's why:

* Mitochondria have their own DNA, called mitochondrial DNA (mtDNA). This is a circular molecule, distinct from the nuclear DNA found in the cell's nucleus. mtDNA encodes for some of the proteins essential for mitochondrial function, like those involved in respiration and energy production.

* Other organelles like the Golgi apparatus, endoplasmic reticulum, lysosomes, and vacuoles do not have their own DNA. They rely on the instructions from the nuclear DNA to function.

It's important to note that while mitochondria have their own DNA, it's still considered part of the cell's overall genetic material.