1-50.Studies of the offspring of nonschizophrenic co-twins from discordant twin pairs suggest that
A) environmental factors play a more important role than genetic factors in the origin of schizophrenia.
B) genetic factors cause schizophrenia,while environmental factors are essentially unimportant.
C) a genetic predisposition to schizophrenia may remain unexpressed in some individuals unless it is released by some unknown environmental factors.
D) the heritability of schizophrenia involves the transmission of a single dominant gene.
Correct Answer:
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Q43: 1-51.Adoption studies are typically used
A)to establish the
Q44: 1-55.Studies of adopted children who were at
Q46: 1-47.Studies of family concordance patterns for schizophrenia
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A)may be an environmental risk factor
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A)genetically influenced
Q50: 1-52.The Danish adoption studies have been criticized
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