One measure one common genomic comparison, called dN $/$ dS$,$ is the ratio of the number of nonsynonymous mutations that have accumulated in a population $($dN$)$ to the number of synonymous mutations that accumulated $($dS$)$ over the same amount of time. Explain the difference between synonymous and nonsynonymous mutations, and then explain what this measure tells you about what kind of evolution might have occurred in the population. In your answer, explain what would it mean to have dN$/$dS be larger than $1?$ Smaller than $1?$ Around $1?$