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twin study

   Also found in: Wikipedia 0.01 sec.
twin study
Epidemiology A study using twins to determine the interplay of nature–genetic and nurture–environment and disease and its treatment; the interpretation of twin study data is often easier as there are exact genetic matches–ie, identical–monozygotic and partial genetic matches–ie, fraternal–dizygotic twins which are used as controls


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The twin study design specifically allows for the teasing apart of genetic and environmental influences by mathematically calculating differences between monozygotic twin pairs (who share 100% of their genetic code) and dyzygotic twin pairs (who share an estimated 50% of their genetic code).
Vogel said a recent British twin study offers a glimpse of the magnitude of the possible longevity-promoting impact of vitamin D supplementation.
A twin study allows scientists to work out the extent of the genetic contribution to a pattern of behaviour compared with the environmental contribution.
 
 
 
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