A 32-yrs-old woman is diagnosed with major depression. What is the chance that her identical twin sister will develop the same disease? (NOT RELATED TO PHARMACOLOGY)
The concordance rate for mood disorders (Mania) in monozygotic twins averages 70% and for depression it is 50% when various studies are combined. The concordance rate in dizygotic twins is approximately 20%.
5%
25%
50%
75%
All India exam