I Think Crypto Is Useless !! (Link in comment section)

What is magnetic flux linked with a coil or N turns or are cross section A held with its plane parallel to the field?

The figure shows the experiment of T.H Morgan on the linkage. If in cross-I, genes are tightly linked and in cross-II, genes are loosely linked then what will be the percentage of recombination produced in cross-I and cross-II respectively?