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Fruit Fly Lab Report

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Introduction: The experiments of Beadle and Tatum proposed a hypothesis that stated that certain gene traits are related to particular enzymes that are missing. Investigation #19 allowed students to investigate and identify the chemical differences within species of fruit flies, in order, to understand the actions of their genes. The following materials were used to visually see the chemical differences in Drosophila melanogaster mutants: the eyes from the flies, paper chromatography, a good solvent for the paper chromatography to interact with and a UV light source. The seven species of flies used include: wild type, white, cinnabar, brown, cinnabar brown double mutant, sepia and white apricot. The phenotypes of these species varied from a red pigment, brown pigment and a white pigment. When a red pigment and brown pigment are crossed, the resulting color is brick red. …show more content…
The pteridines include: sepiapterin (yellow), biopterin (dark blue), 2-amino-4-hydroxypteridine (light blue) and drosopterin (orange). These four pteridines were able to be observed due to either the introduction of cross contamination or the mutants lacked or possessed the gene/ enzyme. Finally, Rf values were calculated, in order, to identify the individual compounds. These values were calculated using the distance of migration, from the baseline and solvent front, visible in the

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