Identical twins are ideal models for clinical trials because they share 100% of their genes and often similar environmental factors, minimizing confounders.

“they share a hundred percent of the genes so when you look at monozygotic and disaggotic twins the monozygotic twins they share 100 of their genes it's almost a perfect clones of each other right and to your point as adolescents they're still in the same house it would be different if you did this with 30-year-old monozygotic twins because at least there might be some environmental differences right and the environment takes place and then a lot of you know epigenetics might change even mutations”