Figure 2: Mode of inheritance. Filled symbol: Affected family member, empty symbol: Unaffected family members. Circle: Female, square: Male. (a) Risk of recurrence if 50% with an autosomal dominant inheritance. (b) The risk of recurrence is 25% with autosomal recessive inheritance. (c) Risk of recurrence is 50% of male child and 50% for females as a carrier with an X-linked inheritance. Auto Dom: Autosomal dominant, Auto Rec: Autosomal recessive, X linked: X linked inheritance.