And to find the recombination frequency, also known as percent recombination what we basically do is we sum up all the offspring that are recombinant. So 110 plus 90. So 110 plus 90, this is the total number of offspring that are recombinant and we divide it by the total number of offspring. So 2000 offspring and what we get is 200 divided by 2000. And that gives us, once we reduce it to one 10th and that's equivalent to 0.1. Now, this is our recombination frequency.