The Fact That Identical Twins Are Often Discordant with Respect

question 5

Multiple Choice

The fact that identical twins are often discordant with respect to mental illnesses such as schizophrenia suggests that

• A) these illnesses do not have a genetic component
• B) environment must play a very meaningful role in the appearance of such illnesses
• C) these illnesses are acquired through observational learning
• D) these illnesses are determined by one's genotype

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