Fruit Fly Lab Report
Escherichia coli (E. coli) is normally found in living intestine of humans and animals. A bacterium that are harmless and is important to the health of the human’s intestinal tract. The intestinal tract is part of the digestive system; having varies of sizes of intestine that transport the food in order to absorb the nutrients and expel the waste. However, some E. coli are pathogenic, causing illness to the host such as diarrhea or harm the outside of the intestinal tract. The host can be effected by the consumption of contaminated water or food, or having contact with the animals or people.
Penicillin, is the first antibiotic that is medically used to fight off a large range of bacterial infection. For this experiment, we will be using ampicillin, it is a part of the penicillin drug group. The ampicillin inhibits the bacteria with the result of killing the bacterium or prevents it from multiplying. “When a bacterium multiplies, small holes open up in their cell walls as the daughter cells divide. These holes are then backfilled with newly produced peptidoglycans and the wall is reconstructed (Newman).”
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Where natural selection occurs when a portion of the population dies off due to the ampicillin, while the rest of the population manage to survive when carrying a resistant gene. As the continuation of survival, the E. coli will develop an immunity against the ampicillin. Making it difficult to eliminate, while it multiplies for a new population of resistant E. coli. When the bacterium become resistant against the antibiotic, patients with the infection will take a longer time to recover to fight off the
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Fruit Fly Lab Report
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Fruit Fly Lab Report
1180 Words | 5 PagesIntroduction: The objective of this lab was to study the trait of aldehyde oxidase (AO) in fruit flies. Aldehyde oxidase is responsible for catalyzing the oxidation of many aldehydes. The aldox gene controls the amount of AO activity in Drosophila melanogaster. In the first part of the lab, an enzyme spot test will be performed on two different vials of Drosophila to exhibit the AO activity of both vial 1A and 1B. A positive test for AO test will present a blue color, while a negative test will present no reaction.
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1617 Words | 7 PagesName: Paul Meyer PS ID #: 1305816 BIOL 3311 Fall 2014 Lab Section: 16254 Date: 10/10/14 TA Instructor Name: Tess Doumas Writing Assignment 3: “Bearded (Brd) gene encodes for multiplication and thickening of chaetae and sensilla by interfering with neurogenic pathway” Introduction An important aspect of research is finding an appropriate model to use for performing one’s experiment(s). For biology and genetics, Drosophila melanogaster, the common fruit fly, has proven to be a suitable subject for over the last 100 years. In 1910, a small research group led by principal investigator Thomas Hunt Morgan at Columbia University first utilized Drosophila as a model organism to discover two fundamental concepts of genetics – chromosomal means
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