If John has schizophrenia,how likely is it that his monozygotic twin brother will also have schizophrenia?

Question

Quizplus · Accepted Answer

Research has shown that monozygotic (identical) twins have a higher likelihood of sharing schizophrenia than dizygotic (fraternal) twins or non-twin siblings. However, the concordance rate for monozygotic twins is not 100%, meaning it is not guaranteed that John's brother will also have schizophrenia. Instead, studies estimate a 50% chance that John's twin will have schizophrenia if John is diagnosed with the disorder.

If John Has Schizophrenia,how Likely Is It That His Monozygotic