Lab 6. Drosophila cross( start) Melat Mebrahtu Lab Instructor: Professor Hicks Principles of Biology Lab II‚ Wednesday 1:00 am- 2:00 pm Abstract The goal of this experiment was to examine the Drophisila fly cross for which the result was seen in two weeks .The Drosophila melanogaster has been a model organism that was experimented in the laboratory. It is a small fruit fly that feeds on and lives on spoiled fruit. It is one of the most valuable organisms in genetics
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An Introduction to Peroxisomes: “Peroxisomal Proteins and Pathways in Drosophila” Discovered in the 1950’s‚ peroxisomes were found floating within a cell’s cytoplasm using electronic microscopy by J. Rhodin (Schluter‚ 2010). These were later classified as organelles and the functions of these organelles were also further discovered and understood. Peroxisomes are membrane-bound organelle that are found in all eukaryotic cells participate in many metabolic reactions within the cell. These reactions
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An Experiment of Adaptation Introduction: Throughout history of time‚ organisms change in relation to their environment‚ consequently‚ adaptation is an essential property of life. This experiment is designed to test the adaptation of Drosophila melanogaster. This kind of insect is also called fruit flies‚ it has been widely used in scientific research because it has a short life cycle about two weeks and it is easy to keep large numbers of them (Manning). Two groups of this species will be used
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controlled cross was conducted between these two true-breeding mutant flies. Their progeny (F1) being heterozygous for both mutations displayed only wild type phenotypes. These two mutations in Drosophila are both believed to follow an autosomal recessive pattern of inheritance. Figure 1. Images Drosophila melanogaster with mutations. From left to right‚ mutation in eye color (e)‚ mutation in wing morphology (w). A controlled cross was performed between a true-breeding fly with the eye color mutation and
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Because there are so many factors involved in analyzing proteins during electrophoresis‚ it is unusual for two different proteins to have the same relative mobility (Gómez‚ 1998). In this experiment‚ Drosophila melanogaster‚ Drosophila virilis‚ as well as a marker strain (mutant strain of D. melanogaster) were used to examine the genetic variation. Electrophoresis followed by the staining of the proteins will cause the enzymes‚ aldehyde oxidase‚ alcohol dehydrogenase‚ and malate dehydrogenase‚ to become
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of Segregation‚ Law of Independent Assortment‚ as well as the principle of dominance. In the early 20th century‚ Thomas Hunt Morgan‚ an American biologist‚ began experimenting on Drosophila melanogaster‚ a common fruit fly. Through his work on D. melanogaster‚ Morgan elucidated the chromosome
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Referring to the hypothesis we predicted in the beginning of this experiment that under ideal conditions‚ we hypothesized that the results will eventually follow the Hardy-Weinberg expectations‚ which means the genotypes frequencies of the Drosophila melanogaster would remain constant; Therefore‚ no evolution had happened to the flies under the ideal conditions. After the chi-squared values were found in each week (table 1)‚ in the third generation where the chi-squared was found to be 0.32 which
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The Effect of Health problems caused by Sugar Sophie Tacheci The Effect of Health problems caused by the amount of Sugar on the Drosophila Sugar intake has increased drastically since the 1820’s‚ causing over 78 ailments such as raised insulin levels‚ rising rates of obesity‚ heart disease and diabetes. Sugar intake per person during the 1820’s was about five pounds per year. Today the average sugar intake is about one hundred pounds per year‚ or about 119 grams
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Entomology: The Study of Insects and their Relatives Insects and their terrestrial relatives belong to the phylum called Arthropoda and have inhabited the earth for an extensive time. Paleontologists show that the earliest fossils‚ most primitive forms of arthropods date back to the Devonian Period over 350 million years ago (Henning 1981). By the Age of Dinosaurs‚ 300 million years ago‚ insects were abundant in number and diversity. Like the dinosaurs‚ some pre-historic forms of insects were
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Drosophila Melanogaster feed on fresh or decomposed fruit. We use a 1:1 ratio of instant medium to distilled water for the medium in culture vials that the flies will have to develop in. After making the medium‚ they have to be sprinkled with one or two grains of
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