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

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.