title: Genetic divergence in relatives of PKU's: low IQ correlation among normal siblings.
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005190:Family; D005260:Female; D005787:Gene Frequency; D005808:Genes, Recessive; D014644:Genetic Variation; D005838:Genotype; D006579:Heterozygote; D006720:Homozygote; D006801:Humans; D007361:Intelligence Tests; D008297:Male; D008954:Models, Biological; D010641:Phenotype; D010661:Phenylketonurias / Q000235:genetics*; D012923:Social Class; D013195:Stanford-Binet Test