These investigations are crucial because they aid researchers in identifying the hereditary and reversible environmental factors that raise the risk of specific diseases. Twin studies are a unique category of epidemiological research intended to quantify the genetic rather than environmental influences on a certain trait.
The conclusions reported by older twin studies have frequently been validated by later molecular genetic investigations, despite the fact that the classical twin studies are still governed by assumptions set back in the 1920s and that the intrinsic restriction of the study design itself. use of dual registers and other cutting-edge but sophisticated software tools like the (SAS).
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