Autosomal recessive inheritance occurs when an individual inherits two copies of a mutant gene, one from each parent, that causes a genetic disorder. The term "autosomal" indicates that the gene in question is located on one of the 22 pairs of autosomes (non-sex chromosomes). "Recessive" means that a person must have two copies of the mutant gene to express the disorder; individuals with only one copy are typically asymptomatic carriers.
