Autosomal recessive is a type of genetic inheritance pattern where two copies of a mutated gene are required for an individual to express a particular trait or disorder. This means that both parents must carry at least one copy of the mutated gene, even if they do not show any symptoms themselves. If both parents pass on the mutated gene, their child has a 25% chance of being affected by the condition. Conditions that follow this inheritance pattern include cystic fibrosis, sickle cell anemia, and Tay-Sachs disease. In these cases, individuals who inherit one normal gene and one mutated gene are considered carriers and typically do not exhibit symptoms. Genetic testing can help identify carriers and assess the risk of passing on these conditions to offspring.