what is the result when a single zygote separates into two parts each developing into a separate individual

ATI RN

Exam 4 Psychology 101

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

A. Dizygotic twin
B. Monozygotic twin
C. Fraternal twin
D. Nonidentical twin

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.

2. Genes ________.

A. determine how a person will behave.
B. cause people to develop mental disorders.
C. determine what characteristics a person will have.
D. determine the range of characteristics a person has.

Correct answer: D

Rationale: Genes determine the range of characteristics a person has. This is the correct answer because genes contribute to a variety of traits and characteristics a person may have, influencing physical attributes, predispositions to certain conditions, and more. Choice A is incorrect because behavior is influenced by a combination of genetic and environmental factors. Choice B is incorrect because mental disorders are complex conditions influenced by various factors beyond just genes. Choice C is incorrect because genes do not solely determine all characteristics a person will have, as environmental factors also play a significant role.

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

A. influenced by one particular gene.
B. influenced by multiple genes.
C. influenced by recessive genes.
D. not influenced by genes.

Correct answer: B

Rationale: When examining heredity, mental disorders are influenced by multiple genes. Mental disorders are complex conditions that typically result from a combination of genetic, environmental, and other factors. While genetics play a significant role in predisposing individuals to mental disorders, it is rare for a single gene to be solely responsible for a mental disorder. Therefore, choice B is correct. Choices A, C, and D are incorrect because mental disorders are not usually influenced by one particular gene, recessive genes specifically, or not influenced by genes at all.

4. What role does brain development play in psychopathology?

A. Brain development has no impact on psychopathology.
B. Brain development plays a crucial role in the onset of many mental disorders.
C. Brain development is only linked to physical disabilities, not mental disorders.
D. Brain development is not associated with mental health.

Correct answer: B

Rationale: Brain development plays a crucial role in the onset of many mental disorders. It affects how the brain processes information and responds to stress, influencing the development of psychopathology. Choice A is incorrect as brain development does impact psychopathology. Choice C is incorrect as brain development is linked to mental disorders as well. Choice D is incorrect as brain development has implications for mental health.

5. Cortisol is a hormone that ________.

A. is released by the hypothalamus and travels to the pituitary gland, causing it to respond.
B. the pituitary gland releases to stimulate the adrenal gland.
C. the adrenal gland produces that mobilizes the body to deal with stress.
D. reduces the reuptake of the monoamine neurotransmitters.

Correct answer: C

Rationale: Cortisol is a hormone produced by the adrenal gland that mobilizes the body to deal with stress. Therefore, choice C is the correct answer. Choices A and B are incorrect as they inaccurately describe the origin and function of cortisol. Choice D is also incorrect as it describes the action of a different type of substance, not cortisol.