Todd's fraternal twin brother suffers from schizophrenia. The odds are ________ percent that he, too, will develop this mental illness.

Name: Todd's fraternal twin brother suffers from schizophrenia. The odds are ________ percent that he, too, will develop this mental illness.
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Question

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Fraternal twins share about 50% of their genes, and the risk for schizophrenia in fraternal twins is about 15%, which is higher than the general population but lower than identical twins.

Todd's Fraternal Twin Brother Suffers from Schizophrenia