👉 In biology, a primigene is a gene that has been identified as having no function in the organism. This is often due to a mutation or deletion of the gene that leads to the absence of its normal functions. Primigenes are often used to study the mechanisms by which genes regulate gene expression and how these regulation may be affected by environmental factors, such as changes in temperature, nutrient availability, or stressors like toxins. In some cases, primigenes can also serve as a model
