Suppose That the Presence of a Particular Gene Is a Necessary

question 4

Multiple Choice

Suppose that the presence of a particular gene is a necessary cause for the occurrence of schizophrenia. Which of the following statements is TRUE?

• A) The gene is also a sufficient cause for the occurrence of schizophrenia.
• B) There are other things besides this gene that can cause schizophrenia.
• C) Most people with schizophrenia will have that gene.
• D) A person with that gene may or may not become schizophrenic.

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Definitions:

Pharynx

The muscular tube that extends from the back of the nasal cavities and mouth down to the esophagus and larynx, serving both respiratory and digestive functions.

Larynx

Also known as the voice box, it is the part of the respiratory tract involved in sound production, breathing, and protecting the trachea against food aspiration.

Nasopharynx

The upper part of the pharynx, connecting the nasal cavity above the soft palate to the oropharynx and laryngopharynx.

Tonsil

Small masses of lymphatic tissue located at the back of the throat that help in fighting off infections.