Background: Founder variants are ancestral variants shared by individuals who are not closely related. The large effect size of some of these variants in the context of Mendelian disorders offers numerous precision medicine opportunities.
Methods: Using one of the largest datasets on Mendelian disorders in the Middle East, we identified 2,908 medically relevant founder variants derived from 18,360 exomes and genomes and investigated their contribution to the clinical annotation of the human genome.
Purpose: Consanguineous couples are typically counseled based on familial pathogenic variants identified in affected children. The residual risk for additional autosomal recessive (AR) variants, however, remains largely understudied.
Methods: First, we surveyed pedigrees of 1,859 consanguineous families for evidence of more than one AR disease.