eng Oriental Scientific Publishing Company Biomedical and Pharmacology Journal 0974-6242 2015-10-25 8 October Spl Edition 109 112 10.13005/bpj/659 4197 article F. Delfin Lovelina 1 Anitha 2 Sudha Jimson 2 Department of Public Health Dentistry, Tagore Dental College and Hospital, Chennai. Department of Oral Pathology and Microbiology, Sree Balaji Dental College and Hospital, Bharath University, Chennai. In the present report, a case of 19 year-old monozygotic twin sisters with variable expression of hypodontia is presented. One of the twins had agenesis of mandibular lateral incisor. The occurrence of dissimilarity in the tooth agenesis in the monozygotic twins may suggest the influence of epigenetic factors in their etiology. DNA fingerprinting was used to confirm monozygosity. https://biomedpharmajournal.org/vol8octoberspledition/hypodontia-genetic-or-environmental-a-case-report-of-monozygotic-twins/ Epigenetics Hypodontia Missing mandibular lateral incisors Monozygotic twins