title: Family studies with chromosomes 21 and 22.
mesh_terms: D002874:Chromosome Mapping; D002904:Chromosomes, Human, 21-22 and Y; D008058:Dihydrolipoamide Dehydrogenase / Q000235:genetics; D005260:Female; D006801:Humans; D008297:Male; D011995:Recombination, Genetic; D013482:Superoxide Dismutase / Q000235:genetics
chemical_list: D013482:Superoxide Dismutase; D008058:Dihydrolipoamide Dehydrogenase