Final answer:
The recombination frequency between loci P and L should be approximately 22%.
Step-by-step explanation:
Recombination frequency is a measure of the genetic distance between two loci on a chromosome. In this case, the recombination frequency between loci Q and P is 9% and between loci Q and L is 13%. Since locus Q is located in between loci P and L, we can approximate the recombination frequency between P and L by adding the recombination frequencies. Therefore, the recombination frequency between P and L should be approximately 22% (9% + 13%).