The following passage describes the effects of a gene mutation, which is a permanent change in a gene. Read the passage and then follow the instructions below.
an E. coli cell with flagella
Certain types of Escherichia coli (E. coli) bacteria have long, thin structures called flagella. The flagella on these bacteria can spin. This motion propels the bacteria and allows them to move through their environments.
Flagella are assembled from many different proteins that stick to each other. Parts of the E. coli flagella are made up of a protein called FliG. The FliG protein is encoded by the FliG gene.
Scientists discovered some E. coli cells that had no flagella. These bacteria had a mutation in the FliG gene. Compared to the FliG gene without a mutation, the mutated FliG gene encoded a form of the FliG protein with a different structure.
This different form of the FliG protein could not stick to other flagella proteins.
Complete the sentence.
