has material basis in autosomal dominant intellectual developmental disorder autosomal dominant intellectual developmental disorder 56 An autosomal dominant intellectual developmental disorder that is characterized by global developmental delay, intellectual disability and in most cases hypotonia, delayed walking, poor fine motor skills, and poor or absent speech that has_material_basis_in heterozygous mutation in the CLTC gene on chromosome 17q23. DOID:0080226 autosomal dominant intellectual developmental disorder-56 autosomal dominant mental retardation 56 disease_ontology MIM:617854 autosomal dominant inheritance