DO_rare_slim has material basis in autosomal dominant intellectual developmental disorder Ramond-Elliott neurodevelopmental syndrome MIM:621421 disease_ontology DOID:0070715 MIM:621421 An autosomal dominant intellectual developmental disorder characterized by global developmental delay, hypotonia, delayed walking or inability to walk, impaired intellectual development that is usually severe, and poor or absent speech that has_material_basis_in heterozygous mutation in the TRA2B gene on chromosome 3q27. autosomal dominant inheritance