Final answer:
Muscles responsible for fine motor control have a low innervation ratio, allowing for more precise movements.
Step-by-step explanation:
The muscles that have a low innervation ratio are typically those that are responsible for fine motor control, such as the muscles that control eye movement or those used in tasks requiring precision, like writing or surgery. In these muscles, there are more motor units, each controlling a relatively small number of muscle fibers, allowing for more precise and controlled movements. This is opposed to gross motor control muscles, like the quadriceps, which have larger innervation ratios because their motor units control more muscle fibers, allowing for powerful but less precise contractions.