The Genetics Of Fruit Flies Essay
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THE GENETICS OF FRUIT FLIES
This lab’s purpose was to determine the genetics of fruit flies, including but not limited to: raising them, feeding them, mating them, sexing them, separating them, and mating them again. We then had to determine which traits were dominant in flies, in my case either the wild eyes or the white eyes, by crossing the flies and through phenotypic ratios we were to determine genotypes. My partner was Eugene Montoya. We chose the white flies because they were more attractive than the Sepias, and there’s nothing I hate more than an ugly fruit fly.
Eugene and I had some difficulties raising, and crossing our fruit flies. A number of problems arose throughout our experiment. After we raised our cultures and attempted to sex them, we had difficulty telling which sex they were due to the fact that some males were in their very early stages of development out of the pupi and had not developed the black tip covering their posterior yet. We also encountered problems when mating flies. When we put the flies together they would not mate. On more than one occasion our flies died before they had sex for some reason, possibly the Fly Nap made them sterile (or it could’ve been the LSD I fed them), but for some reason our flies just didn’t get horny. In order to obtain results, I visited the Virtual Fly Lab online at http://vcourseware4.calstatela.edu and designed a theoretical cross between a wild male and a white female, and a white male with a wild female. Results were as follows:
Pure Wild Male X Pure White Female: 1:1 ratio of Female Wilds to Male White with no Female whites or Male Wilds. We then mated the F1 generation Female Wilds and Male Whites and got the following results: 1:1:1:1 ratio of Male Wilds, Female Wilds, Female Whites...
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