Which of the Following Statements About Polar Mutations Are True

Multiple Choice

Which of the following statements about polar mutations are true? Please select all that apply.

A) A polar mutation is a mutation in one gene that decreases expression of an upstream gene
B) Polar mutations usually increase the distance between two genes in an operon
C) Mutations in the last gene in an operon are not usually polar
D) Polar mutations can usually be rescued by supplying a wild-type version of a gene on a plasmid