What similarities do mitochondria and chloroplasts share?
They both have their own DNA. This makes them different from other organelles, since most DNA in cells is stored in the nucleus. This is probably because both chloroplasts and mitochondria were originally separate organisms. They most likely were absorbed into early eukaryotic cells (ie, cells with a nucleus and other organelles) and had a symbiotic relationship with them. Over time, they evolved along with the cells until they were fully part of the cell and no longer self-sufficient organisms. This idea is called “endosymbiosis.
