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From SNPedia

At least two dozen inherited conditions are more common among people with French-Canadian ancestry than in other groups. [PMID 8194844]

  • Mednik syndrome, a severe inherited disease caused by defects in the adaptor protein gene AP1s1, was identified in 2008. [2] [3] [4]
  • Tyrosinemia type I is a serious disorder caused by an enzyme deficiency. It occurs worldwide in about 1 in 100,000 people, but it affects 1 in 2,000 individuals in one region of Quebec. [[5]]

The French-Canadian Genealogy Podcast, Maple Stars & Stripes, mentions several additional conditions that are more prevalent in French-Canadians, including: