Which of the Following Statements Are TRUE of The $\Delta$ 32 Allele in the CCR5 Gene?
A)It Codes for a 32

Which of the following statements are TRUE of the $\Delta$ 32 allele in the CCR5 gene?

A) It codes for a mutant protein that is completely inactive.
B) It is a deletion that maintains the reading frame.
C) It provides some protection against HIV progression to AIDS in both its heterozygous and homozygous forms.
D) It is an example of a beneficial mutation.
E) It affects the attachment of HIV to an animal cell by altering one of the viral proteins.