* Genes are segments of DNA (or sometimes RNA) that contain the code for a specific protein or functional RNA molecule. So, in that sense, genes are made up of DNA or RNA.
* DNA and RNA are the molecules that genes are *composed* of. Think of it like this: DNA is the blueprint, and genes are specific sections of that blueprint.
To make it simpler:
* DNA: The long, complex molecule that holds all of our genetic information.
* Genes: Specific sections of the DNA molecule that provide instructions for building proteins or other functional molecules.
* RNA: A molecule that helps translate the instructions from DNA into proteins.
Therefore, it's more accurate to say that genes are *made up of* DNA or RNA, rather than the other way around.
