Having an identical twin with Parkinson's disease greatly increases the other twin's likelihood of also getting Parkinson's disease if the:

Question

Quizplus · Accepted Answer

Having an identical twin with Parkinson's disease greatly increases the other twin's likelihood of also getting Parkinson's disease if the first twin had early-onset Parkinson's disease. This is because early-onset Parkinson's disease is more likely to have a genetic component, and identical twins share nearly identical DNA. Late-onset Parkinson's disease is influenced more by environmental factors, so having an identical twin with late-onset Parkinson's disease does not increase the other twin's likelihood as significantly. Gender does not play a significant role in the likelihood of developing Parkinson's disease.

Having an Identical Twin with Parkinson's Disease Greatly Increases the Other