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Twin studies are studies conducted on identical or fraternal twins. They aim to reveal the importance of environmental and genetic influences for traits, phenotypes , and disorders. Twin research is considered a key tool in behavioral genetics and in related fields, from biology to psychology.
The Minnesota Study of Twins Reared Apart was a twin study conducted at the University of Minnesota, independent of the Minnesota Center for Twin and Family Research. In 1979, Thomas J. Bouchard began to study twins who were separated at birth and reared in different families.
Twin study showing impact of divorce and diet on the face, side-by-side profile comparison with aging effects visible. Image credits: Dr.Bahman Guyuron/American Society of Plastic Surgeons
Twin studies are utilized in an attempt to determine how much of a particular trait is attributable to either genetics or environmental influence. These studies compare monozygotic and dizygotic twins for medical, genetic, or psychological characteristics to try to isolate genetic influence from epigenetic and environmental influence.
Identical Strangers: A Memoir of Twins Separated and Reunited is a 2007 memoir written by identical twins Elyse Schein and Paula Bernstein and published by Random House. [1] The authors, born in New York City in 1968 to Leda Witt, daughter of Nathan Witt , were separated as infants, in part, to participate in a " nature versus nurture " twin ...
Using identical twins to measure the study’s results was critical because outside factors often influence results of nutrition-related studies, he says. Because each set of twins in Gardner's ...
A study on Botox labeled as “groundbreaking” compared the evolution of two identical twins, with one receiving constant injections over 13 years and the other aging as nature intended.
A twin study compares the concordance rate of identical twins to that of fraternal twins. This can help suggest whether a disease or a certain trait has a genetic cause. [3] Controversial uses of twin data have looked at concordance rates for homosexuality and intelligence. Other studies have involved looking at the genetic and environmental ...