Janelle is a 23-year old woman who is living happily in the United States. She has a relative who recently developed the symptoms of schizophrenia. Janelle has the highest chance of developing the illness if that relative is
A) Jameson, her 23-year old fraternal twin
B) Jamie, her 52-year old biological mother
C) Janette, her 23-year old identical twin.
D) Jerivicious, her 75-year old grandmother
Answer: C
Rationale: If one identical twin has schizophrenia, the other twin has a 25% to 50% chance of developing it. This rate is significantly higher than those for other types of familial relationships.
Psychology
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