Canadian Medical Guide > Analytical, Diagnostic and Therapeutic Techniques and Equipment > Investigative Techniques > Epidemiologic Methods > Epidemiologic Study Characteristics > Twin Studies Terms and Definitions

Twin Studies

Medical Definition:	Methods of detecting genetic etiology in human traits. The basic premise of twin studies is that monozygotic twins, being formed by the division of a single fertilized ovum, carry identical genes, while dizygotic twins, being formed by the fertilization of two ova by two different spermatozoa, are genetically no more similar than two siblings born after separate pregnancies. (Last, J.M., A Dictionary of Epidemiology, 2d ed)
Guide Notes:	an epidemiol technique for study of twins: do not confuse with articles on TWINS as persons or on specific or general DISEASES IN TWINS; IM GEN only; coord NIM with specific subject (IM) + TWINS (IM) or with specific dis (IM) + DISEASES IN TWINS (IM); do
Previously Indexed:	Diseases in Twins (1966-1994),Twins (1966-1994)

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