process where genetic information directs protein or RNA synthesis
Gene expression is the process by which information from a gene is used to synthesize functional gene products, such as proteins or RNA. This process involves two main stages: transcription, where the DNA sequence of a gene is copied into mRNA, and translation, where the mRNA is used as a template to build proteins. Gene expression is tightly regulated to ensure that the right genes are expressed at the right times and in the right amounts, which is crucial for normal development, cellular function, and response to environmental changes.