Final answer:
In humans, the percentage of strand resolutions resulting in crossover varies depending on the genetic distance between genes on the same chromosome. Recombination frequency is used to measure the distance between genes, with a higher frequency corresponding to a greater distance. The frequency of crossover can range from 0% (linked traits) to 50% (unlinked traits).
Step-by-step explanation:
In humans, the percentage of strand resolutions resulting in crossover varies depending on the genetic distance between genes on the same chromosome. Recombination frequency is used to measure the distance between genes, with a higher frequency corresponding to a greater distance. The frequency of crossover can range from 0% (linked traits) to 50% (unlinked traits). For example, if the recombination frequency is 17%, it indicates that 17% of the offspring are recombinant, suggesting that crossover occurs some of the time.