In order to develop chicken pox, one must be exposed to the virus that causes chicken pox. Note, however, that not everyone who is exposed to the virus is affected. In other words, the virus is a ________

Correct Answer: B

Rationale: The correct answer is B: 'necessary cause.' A necessary cause must be present for a disorder to occur. In the context of developing chicken pox, being exposed to the virus is a necessary condition for contracting the disease. Choices A, C, and D are incorrect. A 'risk factor' increases the probability of developing a disease but is not essential for its occurrence. A 'sufficient cause' can produce the outcome on its own, which is not the case with exposure to the chicken pox virus. A 'contributory cause' adds to other causes to produce an effect, but in this scenario, exposure to the virus is crucial by itself.

Correct Answer: C

Rationale: The correct answer is C: 'polygenic.' Mental disorders are polygenic, which means they are influenced by multiple genes. This term specifically refers to conditions or traits that are caused by more than one gene. Choice A, 'environmental,' is incorrect as it doesn't directly refer to the genetic influence on mental disorders. Choice B, 'chemical circuits,' is incorrect as it is too specific and not a common term used to describe the genetic basis of mental disorders. Choice D, 'probabilistic,' is incorrect as it relates more to the likelihood or chance of something happening rather than the genetic influence on mental disorders.

Correct Answer: C

Rationale: Genes are made of DNA, which is the genetic material that carries the instructions for the development, functioning, growth, and reproduction of organisms. While chromosomes contain genes, they are not what genes themselves are made of. Proteins are involved in gene expression and regulation, but they are not the primary material genes consist of. Trisomes is an incorrect term in this context and does not relate to the composition of 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.

Correct Answer: D

Rationale: Castration anxiety is a concept from Freudian psychoanalytic theory that occurs during the Phallic stage. This stage occurs between 3 to 6 years of age and is when children experience conflicts related to the Oedipus complex (boys) and Electra complex (girls). During this stage, children may fear castration (in boys) or penis envy (in girls), which are crucial components of castration anxiety. Therefore, the correct answer is Phallic. The other options (A: Genital, B: Oral, C: Anal) are incorrect as they do not specifically involve castration anxiety but rather represent different stages in Freud's psychosexual development theory.