what are some common methods used to study genetic influences on behavior
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Psychology 2301 Exam 1

1. What are some common methods used to study genetic influences on behavior?

Correct answer: B

Rationale: Common methods used to study genetic influences on behavior include twin studies, adoption studies, and gene mapping. Twin studies help to compare the similarities between identical and fraternal twins to estimate the heritability of a trait. Adoption studies look at the similarities between adopted children and their biological and adoptive parents to determine genetic influences. Gene mapping involves identifying specific genes associated with certain behaviors. Choices A, C, and D are incorrect because genetic influences on behavior are not solely studied through twin studies or family history, and while the understanding of genetic influences may vary, there are established methods to study them.

2. Cross-cultural research on stress demonstrates that ________.

Correct answer: C

Rationale: Cross-cultural research on stress demonstrates that responses to stress vary cross-culturally. Choice A is incorrect because depression being a common response in all countries studied is not supported by cross-cultural research findings. Choice B is incorrect as it generalizes that stress rarely leads to illness in non-Western cultures, which is not universally true. Choice D is incorrect as culture-specific reactions can indeed respond to alterations in the environment, as observed in various cross-cultural studies.

3. When examining heredity, mental disorders are almost always ________.

Correct answer: B

Rationale: When examining heredity and mental disorders, it is important to note that these conditions are influenced by multiple genes working together. Mental disorders are complex traits that arise from the interplay of various genetic and environmental factors. Therefore, choice B, 'influenced by multiple genes,' is the correct answer. Choice A, 'influenced by one particular gene,' is incorrect because mental disorders typically do not result from the action of a single gene. Choice C, 'influenced by recessive genes,' is incorrect as it oversimplifies the genetic basis of mental disorders. Choice D, 'not influenced by genes,' is also incorrect as genes play a significant role in the development of mental disorders.

4. Which characteristics are associated with adults fixated in the anal stage?

Correct answer: A

Rationale: The correct answer is A: 'Orderliness, obstinacy, or messiness.' According to Freud's psychosexual theory, fixation in the anal stage can lead to these characteristics in adulthood. Choice B is incorrect as fixation in the oral stage is associated with issues related to dependency and aggression. Choice C is incorrect as it refers to the Electra complex, which is not related to the anal stage fixation. Choice D is incorrect as it refers to penis envy and the female Oedipus complex, which are not directly related to characteristics of adults fixated in the anal stage.

5. While having a gene for Parkinson's disease guarantees that Parkinson's disease will develop, this is not the only factor that can lead to Parkinson's disease. In other words, the presence of the gene is a ________, but not a ________.

Correct answer: B

Rationale: The correct answer is B: 'sufficient cause; necessary cause.' A sufficient cause will inevitably produce the disorder, but it is not the only factor. In this case, having the gene for Parkinson's disease is a sufficient cause, meaning it alone can lead to the development of the disease. However, it is not a necessary cause because Parkinson's disease can still develop without the presence of this gene. Choices A, C, and D are incorrect because they do not accurately describe the relationship between the gene and the development of Parkinson's disease as depicted in the question.

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