Gene regulation

Gene regulation is the process of controlling which genes in a cell's DNA are expressed (used to make a functional product such as a protein). Gene regulation is how a cell controls which genes, out of the many genes in its genome, are "turned on" (expressed). Thanks to gene regulation, each cell type in your body has a different set of active genes – despite the fact that almost all the cells of your body contain the exact same DNA.  [ Kh. 18 ]