Final answer:
A genetic map is represented by the relative order of genes on a chromosome. The correct genetic map for the given information is cl–dp–ap.
Step-by-step explanation:
The correct genetic map is option 3) cl–dp–ap.
The question states that the distance between dp and ap is greatest, indicating that dp and ap should be on the outside. This means that cl must be in the middle.
Therefore, the correct genetic map would be dp–cl––––––––ap, which translates to cl–dp–ap in option 3).