Answer:
One gene codes for one protein.
Explanation:
"One gene codes for one protein", this statement is right about the relationship between gene and protein. In the central dogma of the cell, DNA carries genes on it and transcribed into RNA and then translated into protein. It is all about flow of genetic information from genes to protein. In another way, one gene controls the synthesis and activity of a protein.
In contrast, other statements are night right because they do not meet the criteria of the relationship between genes and proteins.