Step 2. Observe adults First, to observe the adults, two capped glass vials containing culture medium and Drosophila from larva to adult stages were obtained. Each of the two vials was carefully observed one at a time for natural and mating behavior.…
Did research on what males and females look like. We observed the frozen flies. On the first week we used fly nap as an anesthetic for the flies and waiting for them to fall asleep. We sexed the flies and put 10 male and 10 female into a tube.…
The posterior scutellar bristles in D. melanogaster are two long bristles attached to the end of the scutellum and projected in an outward V-shape. Yet, in hot cheeto, the V-shape projection is not present because the short bristles curled to opposite sides of the scutellum. Humeral bristles, dorsocentral bristles, notopleural bristles, anterior scutellar bristles, orbital bristles, and ocellar bristles are all affected by this mutation. This mutation affects the phenotype equally in both female and male mutants. However, the mortality rate in hot cheeto females was greater than males.…
For example a bird’s beak may be longer or shorter depending on how they can attain food in the location they reside. Natural selection has different branches to it; the one studied in this lab is called directional selection. Directional selection is when an extreme phenotype is favoured over other physical alleles (Reece). The directional selection that may be present within this study is if gall size determines if the larvae is dead or…
We hypothesized that curly wing flies would have difficulty courting past the flapping of its wings to create a “love song”. The FraxE flies are model organisms of a mutation that causes mental retardation and various behavioral problems. We did not expect very much courtship at all in this group. Lilli flies were similar to the FraxE model except they had the protein that was lost with the mutation placed roughly 50% back into them. We thought the flies with this mutation would have more courtship then the FraxE but less than the curly wing fly.…
As a group we have taken two sterile plastic vials and placed a cup of Drosophila medium powder into each one. After adding a cup of the medium with added half a cup of distillated water into the plastic vial, which allowed the medium to dissolve into it. We allowed a few minutes for the media to be absorbed and afterwards we applied a cotton plug to close the entrance to the vial. Anesthetizing the Drosophila flies In the lab, we had the fruit flies already asleep in a green bucket filled all the way up with ice.…
Fruit flies are used in genetic labs often because they are small, produce a lot of young, and only have four major chromosomes. Since the fourth chromosome is so small, it is not used very often. The fruit fly’s scientific name is Drosophila. In this experiment, we mated flies to determine the location of a p-element on one of the three chromosomes.…
For this experiment we tested how a finches phenotype affects their fitness in drought and predatory conditions. We gathered twenty five hazelnuts (Corylus), walnuts (Juglans regia), brazil nuts (Bertholletia excelsa), and almonds (Prunus dulcis). Theywereallmixedtogetheron a large plate. There were a total of 28 pliersusedtocollectnutshowever,ourgroupwaslimited to six. When collecting plierswereineachgroupmember'sdominanthandandaplasticcupwas in the nondominant hand.…
The fruit flies does deal with dominant vs. recessive for the wing traits. Complete dominance occurs when the dominant allele complete cover (hide) the recessive allele. This occurs to the wing traits in the fruit flies. Normal wings are dominant over vestigial wing and base on the data, the female that carries the vestigial wing did not create any F1 generation of vestigial traits. This occurs because the male has normal wing so when the two parent meet; the dominant normal wing in the male completely cover up the recessive vestigial wing in the female traits.…
Name: Enrique Vazquez PS ID #: 1259993 BIOL 3311 Fall 2014 Date: October 2, 2014 Gene: Bar TA Instructor Name: Fahmi Mesmar Lab Section: 16258 Writing Assignment 3: Eye morphology of Drosophila melanogaster; Bar mutation effects on ommatidial development of the compound eye. Introduction: Drosophila melanogaster have been used for centuries as model organisms due to their relatively small size as well as their inexpensive and simple diet. Fruit flies also have to ability to reproduce in large amounts considering their relatively short life cycles.…
The apterous gene mutations is a recessive trait that is inherited causing a varying phenotypes such as different wing deformities. Other phenotypes observed are the decrease in life span and female sterility. Ap is required to regulate gene expression needed for the development of Drosophila wings and haltere discs. Decreased ap activity due to the overexpression of dLMO results in wing mutations. The phenotypes displayed in apterous mutants are places them at a disadvantage compared to wild type flies.…
For this lab we conducted a population genetics study on the frequency of wild and apterous flies within a small population of fruit flies. The fruit fly Drosophila works well for genetic and evolutionary geared studies because they have a relatively short generation time but are intricate enough to reveal some biological principles that are parallel to many different kinds of eukaryotic organisms. When exposed to artificial selection in laboratory experiments, fruit flies have experienced dramatic changes behavioral and evolutionary traits within ten generations or less (Goldsmith, 1991). It is important to note that wild flies have wings and apterous flies do not. The purpose of artificial selection is for humans to modify species over generations by intentionally breeding two organisms with the objective of acquiring a specific trait.…
Throughout the article, this claim is supported by mainly primary sources, including anecdotes about the fruit fly Drosophila, the Human Genome Project, and newspaper articles. One example given…
Gene crossover, the exchange of genetic material between two homologous chromosomes, can be observed in many different instances with the help of model organisms. Many scientists observe gene crossover to better comprehend the heritability patterns of unrelated genes (Chen and Olive, 1965). In the case of this experiment, the use of Sodaria allowed students to observe the inheritance pattern of two different phenotypes when crossed in a a petri dish (Saleem, et al., 2001). Sordaria, a microfungi commonly found in feces of herbivores, was the subject of this study. Using Sodaria, students were able to observe random genetic crossing due to a mutation that the test subject underwent many years ago that only allows it to mate via sexual reproduction.…
Purpose: The purpose of this simulation is to demonstrate how alleles work and practice the skill of figuring out what genotype is dominate based off of the phenotype of the offsprings. Background info: Fruit flies or Drosophila melanogaster work best in experiments because Drosophila melanogaster has 60% of genes that are mutated, amplified, or deleted in human diseases. Drosophila melanogaster also has a short lifespan which makes them best for quick experiments. They also mate and develop quickly, making it easier to study the offsprings. Drosophila melanogaster also have distinguishable characteristics that make telling the differences and similarities easier to see.…