Studies of the offspring of nonschizophrenic co-twins from discordant twin pairs suggest that
A) genetic factors cause schizophrenia, while environmental factors are essentially unimportant.
B) the heritability of schizophrenia involves the transmission of a single dominant gene.
C) a genetic predisposition to schizophrenia may remain unexpressed in some individuals unless it is
released by some unknown environmental factors.
D) environmental factors play a more important role than genetic factors in the origin of schizophrenia.
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The U.S. euthanasia society is presently called
a. USES. b. EXIT. c. the Hemlock Society. d. the American Voluntary Euthanasia Society. e. Compassion and Choices