Experiment1_SexRatio.docx

Materials and methods we began with three different

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Materials and Methods We began with three different samples of Drosophila – A, E, and G – of differing sizes due to stocking variance. Sample A consisted of 71 flies, E of 49, and G of 90. We then applied a fly anesthesia to a brush and inserted it into the tubes containing the flies. After the fly nap took effect, we identified and counted the males and females for each group respectively. 1
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Results and Discussion Group Male Female A 42 29 E 19 30 G 42 48 Total 103 107 Table 1 shows Drosophila flies sex determination and count We found the samples to contain differences from one another – group A had a 1.5:1 ratio, group E had a 1:1.6 ratio, and group G had a .9:1 ratio (all male:female). However, none demonstrated a ratio of 2:1 or vice versa, which would have led to a failure in hypothesis. In addition, when summed together, the overall total of males to females is 1:1. These results agree with the expectation of sex being assigned randomly, resulting in a 50/50 split. Works Cited Tauber Lab. The Fly Manual: A Guide to Working With Drosophila . University of Leicester. 2
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  • Spring '14
  • BarrieD.Robison
  • Tauber Lab, Kira Hunter, Drosophila fly samples

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