In Part B, when we mate an F one generation female, so what that means is we take a female that has the same genotype as the f one generation. And what that basically means is this is the f one generation. So we have a female that has a genotype that is uppercase G, lower case G, uppercase N, lowercase N, and we make this with a homozygous recessive male that is homozygous recessive for both traits. So homozygous recessive for both traits means we have lowercase G, lowercase G, lowercase N, lowercase N. So when we mate or cross an F one generation female, this individual here with a homozygous recessive male, this individual here, we obtain 2000 offspring. So we have 2000 individual fruit flies. Now, if we assume that the traits, the color trait and this wing type trade are linked, that means they are located on the same chromosome, but we assume no crossing over actually took place.