autosomal By Ivan Suarez Robles 13 Nov, 2010 Pertaining to an autosome, a chromosome that is not a sex chromosome. An autosomal gene is a gene that is on an autosome.Related Articles: Glossary: friedreich's ataxiaOptimising occupational performance through sensory modulation interventions: Case reports of two young adults diagnosed with juvenile Huntington’s diseaseGlossary: autosomal dominant