The Speech Disorder of the KE Family Has Been Linked

question 29

Multiple Choice

The speech disorder of the KE family has been linked to

• A) a single gene on chromosome 7.
• B) the use of recreational drugs such as cocaine.
• C) a single gene on chromosome 23.
• D) abnormal neural development of the posterior association cortex.
• E) abnormal neural development of the right frontal cortex.

---

Definitions:

Melatonin

A hormone produced by the pineal gland that regulates sleep-wake cycles and is influenced by the presence of light.

Biological Clock

An internal mechanism in organisms that controls the cycle of biological processes and behaviors in a roughly 24-hour cycle.

Phototherapy

A treatment method that uses light to treat certain conditions, such as jaundice in newborns or skin disorders like psoriasis.

Seasonal Affective Disorder (SAD)

A controversial disorder in which a person experiences depression during the winter and an improvement of mood in the spring.