Find a good Internet source that explains an interesting aspect of gene expression particularly well. Present your source and briefly summarize the information for your classmates.

Be sure to cite your source and include a link or copy/paste a direct quotation from your source.

Each cell contains all the instructions necessary for all cells of the body to perform all functions needed over the course of the person’s lifetime. But one individual cell only needs to access a small portion of the entire genome at any one time. What are the mechanisms for turning a specific gene on or off?