The question asks about organelles that have their own DNA and ribosomes among the given options. Let's examine each option:

1. Endoplasmic reticulum and Golgi bodies: These are membrane-bound organelles involved in the synthesis, folding, modification, and transport of proteins and lipids. However, they do not contain their own DNA and ribosomes.

2. Mitochondria and Chloroplast: These organelles are unique because they contain their own DNA and ribosomes. The DNA is circular, similar to bacterial DNA, supporting the endosymbiotic theory. This theory suggests that mitochondria and chloroplasts originated as free-living bacteria that were taken up by a larger host cell.

3. Endoplasmic reticulum and cyto-skeleton: The endoplasmic reticulum, as mentioned before, does not have its own DNA or ribosomes. The cytoskeleton is a network of fibers that provide structural support to cells but also lacks DNA and ribosomes.

4. Cell wall and nucleolus: The cell wall is a rigid structure outside the plasma membrane in plant cells, providing support and protection. It does not contain DNA or ribosomes. The nucleolus is a region within the nucleus involved in ribosome synthesis but itself does not have DNA independent of the nuclear genome.

Thus, the correct answer is Mitochondria and Chloroplast as both of these organelles have their own DNA and ribosomes, enabling them to synthesize some of their own proteins independently of the cell's nuclear DNA.