Inheritance Autosomal dominant Affected Unaffected father mother Fig 5 Diagnosed at 55 Cataracts 120 repea Diagnosed at 48y Diagnosed at 50y Grp myotonia Bilateral cataracts Facial weaknes 500 repeats Myotonia Cardiac problems 700 repeats Diagnosed at birth Facialweakness Severe neonatal hypotonia repeat Affected Unaffected Unaffected Affe son daughter son daughter Unaffected AffectedInheritance