Morphological variations for the permanent mandibular first molars in human monozygotic and dizygotic twins.
D005260:Female; D006801:Humans; D008334:Mandible; D003765:Models, Dental; D008963:Molar / Q000033:anatomy & histology*; D009030:Mosaicism; D010641:Phenotype; D011247:Pregnancy; D012737:Sex Factors; D014427:Twins