What is the most likely cause of a disorder if both monozygotic and dizygotic twins show a high concordance rate?

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Quizplus · Accepted Answer

If both monozygotic and dizygotic twins show a high concordance rate, it suggests that shared environmental experiences have a strong influence on the disorder. If the disorder was caused by recessive or dominant genes, we would expect to see a higher concordance rate in monozygotic twins (who share more of their genes) compared to dizygotic twins. If the disorder was caused by different environmental experiences, we would expect to see a lower concordance rate in monozygotic twins compared to dizygotic twins.

What Is the Most Likely Cause of a Disorder If