what does the genetic study of identical twins reared apart help to clarify
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Psychology 101 Exam 3 Test

1. What does the genetic study of identical twins reared apart help to clarify?

Correct answer: C

Rationale: The correct answer is C: 'Interaction between genetics and environment.' The genetic study of identical twins reared apart helps in understanding how both genetics and environment play a role in shaping an individual's traits and behaviors. This type of study allows researchers to tease apart the effects of genetic inheritance from those of environmental influences. Choices A, B, and D are incorrect because the study of identical twins reared apart specifically focuses on the interplay between genetics and environment, rather than solely on differences in brain function, genetic influence on behavior, or the role of environmental factors alone.

2. How do socioeconomic factors affect mental health?

Correct answer: B

Rationale: The correct answer is B. Socioeconomic factors like income and education levels are key determinants of mental health. They influence access to resources such as healthcare, housing, and social support systems, which can impact an individual's mental well-being. Additionally, socioeconomic factors can contribute to stress levels and overall quality of life, which in turn affect mental health. Choice A is incorrect because socioeconomic factors do play a significant role in mental health outcomes. Choice C is incorrect as socioeconomic factors have a broad impact on mental health beyond extreme cases. Choice D is also incorrect as numerous studies have shown the clear impact of socioeconomic factors on mental health.

3. Children raised in orphanages tend to have ________.

Correct answer: B

Rationale: The correct answer is B: 'less cortical gray matter than those raised by their parents.' Studies have shown that children raised in orphanages tend to have less cortical gray matter compared to those raised by their parents. This is due to the lack of individualized care, attention, and stimulation that can negatively impact brain development. Choices A, C, and D are incorrect because there is no direct correlation between cortical gray matter and the number of friendships when comparing children raised in orphanages and those raised by their parents.

4. What is the result when a single zygote separates into two parts, each developing into a separate individual?

Correct answer: B

Rationale: The correct answer is B, Monozygotic twin. A monozygotic twin, also known as an identical twin, is the result when a single zygote splits into two parts, leading to the development of two genetically identical individuals. Choices A, C, and D are incorrect because they do not accurately describe the scenario where a single zygote splits into two parts to form identical twins. Dizygotic twin (Choice A) refers to fraternal twins, which result from two separate eggs fertilized by two different sperm cells. Fraternal twin (Choice C) is another term for dizygotic twins, arising from two separate zygotes. Nonidentical twin (Choice D) is a synonymous term for dizygotic or fraternal twins, indicating that they are not genetically identical.

5. Which part of the superego develops from our experiences with rewards for proper behavior and tells us what we should do?

Correct answer: B

Rationale: The correct answer is B, the Ego-ideal. The Ego-ideal is a subsystem of the superego that develops from experiences with rewards for proper behavior. It guides individuals on what they should do, setting standards and ideals for behavior. Choice A, Conscience, represents the part of the superego that focuses on what one should not do, based on experiences with punishment for improper behavior. Choices C and D, regressing back to the anal and oral stages respectively, are irrelevant to the development of the superego's components and are not related to experiences with rewards for proper behavior.

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