Select All the Characteristics That Make Sickle-Cell Disease a Good

Select all the characteristics that make sickle-cell disease a good candidate to study genetic diseases. (Check all that apply.)

A) It is easily identifiable by a physical characteristic.
B) It results from a single change in a single gene.
C) It can be influenced by the environment.
D) The sickle-cell inheritance pattern is not influenced by other genes.