Twin Studies as Topic Sufficient http://purl.bioontology.org/ontology/MESH/D018433 SCDO:0001198 Works about methods of detecting genetic etiology in human traits. The basic premise of twin studies is that monozygotic twins carry identical genes, while zygotic twins are genetically no more similar than two siblings born after separate pregnancies. (Last, J.M., A Dictionary of Epidemiology, 2d ed) MESH:D018433 Epidemiologic Study Characteristics