Fifth Pedigree

The following pedigree presents you with the inheritance pattern of a trait within a family. Use the interrelationships between the affected family members to determine what type of inheritance is followed by this trait.

Please determine the genotypes of family members, and choose the option which best describes the inheritance pattern of the highlighted trait (magenta color) in the above family pedigree.

1. Autosomal Dominant Inheritance - Please note that an unaffected mother and an unaffected father have affected children in this family (grey arrows); thus, the trait cannot be dominant. Please RETURN to the Fifth Pedigree assessment.
2. Mitochondrial Inheritance
3. X-linked Inheritance
4. Y-linked Inheritance