Chromatography Of Drosophila Essay

628 WordsFeb 22, 20123 Pages
Drosophila Identification of Pigments from Drosophila heads by a Chromatography Procedure Drosophila melanogaster, is generally known as the common fruit fly or vinegar fly, and it is found all over the world. It is used as a model organism that is widely used for biological research that for years has helped to understand the evolutionary changes of the cell, and how genes relate to development. It is typically used because this specie is easy to care for, it breeds quickly, lays many eggs, and it has a short lifespan. Geneticists have sequenced their chromosomes and have isolated, characterized and genetically mapped many naturally occurring and artificially induced mutants. Genes have an result on the phenotype of an organism by regulating the production of proteins that regulate the synthesis/degradation, transport, and organization of cell molecules. Proteins that catalyze synthesis/degradation reactions are called enzymes. Reactions catalyzed by enzymes are organized into sequence of reactions leading to a specific product or set of products, called a biochemical pathway. The pigments in charge of the eye color of Drosophila are produced by two biochemical pathways. One of them is called the ommochrome pathway which produces a brown pigment, and the other is called pteridine pathway which produces a bright red pigment. Each pathway drives through several intermediate steps catalyzed by different enzymes, and each enzyme is the product of a single gene thus fruit fly eye color is a multigene trait. The final eye color is a combination of several colored compounds. In addition, the initial substrate molecules must be transported into the eye by the action of specific membrane transport proteins. The wild-type fly known as the predominant strain of an organism, has a full complement of functioning genes producing all the enzymes needed to produce both the

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