Drosophila

Scientists have been using various organisms to perform experiments and do research to understand the various phenomenon that relates to human since doing experiments on human is against the law of human right. Drosophila melanogaster (fruit flies) is one of the model organism that can be used for various applications. In this experiment, the fruit flies were used to observe the basic genetic mechanism, leading to understanding the mode of inheritances of other organisms since they all share…

A common fruit fly, Drosophila melanogaster, was used in the experiment to determine the mode of inheritance of the apterous mutant flies over several generations. The possible modes of inheritance could have been autosomal or X-linked and dominant or recessive. It was predicated that the apterous Drosophila flies were autosomal recessive, hence evaluated using reciprocal monohybrid crosses. The F1 and F2 generations were observed and compared to the hypothesis. An analysis of the F2 generation…

The purpose of this experiment was to find out why Drosophila melanogaster is an important organism to understand eukaryotic genetics which was accomplished by first observing the sex of the flies and distinguishing between wild type and vestigial wing phenotypes. We also determined whether the allele that caused the vestigial wing phenotype is sex- linked or autosomal and either dominant or recessive from flies that were in the F1 generation. Our data collected by observing the sex of the F1…

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…

Introduction Drosophila melanogaster can be considered model organisms for the study of genetics. Some characteristics that contribute to this status are their quick lifecycles, large amount of offspring, and the presence of only four chromosomes. Drosophila melanogaster contain bristles on the thorax, head, legs, and abdomen. These bristles are used as a sensory mechanism, allowing fruit flies to detect their surroundings as they fly and walk around their environment (Yehuda, 2011). The rate…

A study conducted in Israel by researchers at Bar-Ilan University shows promising results in the battle of alcohol addiction. Scientist test fruit flies to discover how to pleasure flies without alcohol consumption. The head of the research team, Galit Shohat-Ophir tested flies under the red-light district to see if they were affected by the red-light. This activated a protein, called corazonim (CRZ) located in their abdomen that caused them to ejaculation. As a result, to their exposure the…

as drosophila have been used extensively to demonstrate the classical Mendelian laws because they are inexpensive and abundant in genetic variations due to a small number of chromosomes. The purpose of this lab was to determine the phenotypic ratio for monohybrid and dihybrid crosses using drosophila. In a monohybrid cross, a single trait (eye color) is crossed in the organism and in a dihybrid cross,two different traits (eye color and wings) are crossed for a particular organism (drosophila).…

Our group was assigned fruit flies with the mutated traits of shadow body and stubby wings. These traits were easily identifiable. A shadowed body was gray instead of the wild-type color of light brown, and stubby wings were nearly absent from the organism when they should be prominent. In this experiment, we attempted to determine the mode of inheritance for these two traits. After the parents mated, we viewed their F1 offspring. We noticed this generation didn’t contain either of the…

ratio, and that the traits would be autosomal, unlinked recessive as well. This hypothesis was also rejected due to the test statistic, 89.95, being larger than the critical value, 7.815. White eyes are found to be a recessive, sex-linked trait in Drosophila Melanogaster; the amount of males having white eyes is significantly higher than the amount of females. In Table 1.2 we see that the amount…

In order to be able to determine whether the drosophila Melanogaster fly cross will follow Mendel’s law of Independent assortment in a 9:3:3:1 phenotypic ratio a dihybrid cross was performed of cinnabar brown flies with wild type flies. It was observed that the mutant phenotypes became visible in the second filial generation, thus following the law of independent assortment in the first filial generation. It was also concluded that in the first filial generation the dominant genotypes masked the…