What does a frequency of recombination of 50% indicate? campbell?

When 50% of all offspring are recombinants, geneticists say there is a 50% frequency of recombination.

A 50% frequency of recombination is observed for any two genes that are located on different chromosomes and are therefore unlinked.

This is a result of independent assortment. When two genes are close together on the same chromosome, they do not assort independently and are said to be linked.