Sickle-Cell Disease Is Caused by a Single Mutation in the DNA

question 15

Multiple Choice

Sickle-cell disease is caused by a single mutation in the DNA of a particular gene. A person with this disease has red blood cells that lose their original donut shape and form a sickle shape. People with this disorder suffer from low energy levels, blood clots, and strokes. This is an example of

• A) a multifactorial trait.
• B) polygenic inheritance.
• C) pleiotropy.
• D) codominance.
• E) incomplete dominance.

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Definitions:

Medicare Benefits

The healthcare services and coverage provided under Medicare, a federal health insurance program for people aged 65 and older, and some younger individuals with disabilities.

Terminally Ill

Referring to a person suffering from a disease that is incurable and expected to lead to death within a short period.

Managed Care

A health care delivery system organized to manage cost, utilization, and quality, often through contracted arrangements with providers.

HMO

Health Maintenance Organization; a medical insurance group that provides health services for a fixed annual fee.