Gene Expression Analysis is a scientific method used to study how genes are turned on or off in cells. This process helps researchers understand how genes influence various biological functions and how they respond to different conditions, such as diseases or environmental changes. By measuring the levels of RNA produced from genes, scientists can determine which genes are active and to what extent. The analysis often involves techniques like RNA sequencing or microarrays, which allow for the comparison of gene activity across different samples. This information is crucial for fields like genetics, molecular biology, and medicine, as it can lead to insights into disease mechanisms and potential treatments.