Which of the following do all cells in a multicellular organism have in common?

1. they all express the same genes.

2. they all have the same proteins.

3. they all have the same mrna.

4. they all have the same dna.

The correct answer is (d) They all have the same DNA.

All the multicellular organisms have same DNA but the different parts of the body has different gene expression. For example: the same DNA is found in the cells of kidney and liver, but the gene expression for liver results in large number of hepatocytes and the same DNA in the kidney will give rise to nephrons.This proves that all the cells in the multicellular organisms have same DNA but their expression of protein in different cells are different.