Recombination frequencies can be easily calculated by adding the
number of offspring that are different from the parents, then dividing by
the total number of offspring. Let's say you are studying fruit flies and
you cross a wild type, grey female with a vestigial, black male. The F1
offspring are as follows: 650 wild type/grey, 595 vestigial/black, 107
wild type/black, and 91 vestigial/grey. What is the recombination
frequency between the genes for wing type and body color?