Also, mutations within the fruit are easy to detect, which means that differences in traits will be highly recognizable. Fruit flies of the family Drosophilidae were used in this experiment for these same reasons. Once you've entered the site, it pretty much explains what you should be doing. Look at the site to see list of different traits and mutations for the fruit fly. You're going to be working with flies and you'll be choosing what traits they'll have.
Wild type is the term for flies that are normal and have no mutations.
Give a fly which you will be mating traits by selecting certain mutations for it. It's my personal recommendation to select one or two traits at first because selecting a whole bunch oftraits can yield results that are complicated. Using a specific traits instead of a group of traits all at once can be easier to follow. This can help you trace certain traits from certain parents, and determine if they are dominant or recessive. A lot of the crosses which my lab group performed yielded unusual results.