Lionel and Matthew are identical twins. Lionel develops symptoms of schizophrenia in his 20s. Matthew tells the doctor that he is worried that he might also develop symptoms in the near future. What is the most accurate response that his doctor could give?
A. Because you are identical twins, the likelihood of your developing schizophrenia too is close to 100 percent.
B. Although you are identical twins, the likelihood of your developing schizophrenia is only about 50 percent.
C. Although you are identical twins, the likelihood of your developing schizophrenia is only about 20 percent.
D. Because you are identical twins, the likelihood of your developing schizophrenia is 10 times higher than if you were fraternal twins.
Answer: B
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