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Gene Expression Part 1: Reading Genes to Make Proteins: Overview of Gene Expression Part 1 Don Lee Department of Agronomy and Horticulture at University of Nebraska-Lincoln, USA Patricia Hain Department of Agronomy and Horticulture at University of Nebraska-Lincoln, USA Lesson Navigation Tips: - Click on 'Animations' button found to the left in order to view the animation which supplements this lesson. You can also click on the animation icon within the text. - Click once on figures to see enlarged versions. - Click once on words in color to bring up their definitions. A gene will only control a trait in an organism when the gene is expressed. This means the gene is read in the cell to make a protein that carries out a specific function. This lesson describes the basic steps in the gene expression process.