Drosophila Essays

Drosophila is a fly species that is used in genetics. Since Drosophila goes through life cycles extremely quickly, it is one of the best specimens to use in a multiple generation experiment. The purpose of this experiment is to follow the genetic phenotype of the offspring and determine the genotype, which will most likely predominately be the wild type phenotype with a few recessive traits. To conduct the experiment, we first cross the parents, wild type with sepia eyes and vestigial wings or black

Drosophila is a genus of small flies, belonging to the family Drosophilidae, whose members are often called “fruit flies”. One species of Drosophila in particular D.melanogaster, has been heavily used in research in genetics and is a common model organism in developmental biology. The entire genus, however, contains about 1,500 species and is very diverse in appearance, behavior, and breeding habitat. Scientists who study Drosophila attribute the species’ diversity to its ability to be competitive

Drosophila melanogaster Lab Report Guidelines Title Page (this needs to be its own page as a cover page) Descriptive title Your name Your group number and lab partners name Class Date submitted Introduction (this could easily be 2-3 pages) Background research with in-text citations (should include such things as general info on Drosophila melanogaster, why we use them as a genetic model system, descriptions of the different modes of genetic transmission and how you can tell which one your group’s

Introduction Drosophila melanogaster has been studied by scientists for over a decade, since the first use in 1901 by a Harvard group led by William Castle's (Jennings, 2011). The main reason the Drosophila melanogaster was used is the fact that they only have four chromosomes, making the mapping of their DNA more manageable, compared to organisms like humans who have twenty-three chromosomes (Elgin, 2018). Drosophila melanogaster also have short life span and larval phase, can be reasonably easy

purpose of this lab is to choose a complex set of traits of Drosophila melanogaster and breed them to evaluate the phenotypes of the offspring created. There was an F1 cross of males and females with different traits and we evaluated their offspring (F2 generation.) The class was given the option of choosing simple autosomal or sex-linked patterns. This lab was performed following the procedure in the College Boards AP Formal Lab #7: Drosophila Genetics. Our results for the breeding were a phenotypic

the primary literature, briefly summarize two studies that have used Drosophila as a model organism in a genetic or evolutionary context (Twenty Five Marks). The aggressive behaviour of the Fruit flies (Drosophila melanogaster) have been observed in a study to see the reaction of various neurobiological factors. Several techniques are used in the study including behavioural and genetic techniques. In the brain of the Drosophila melanogaster, neurotransmitters dopamine and octopamine as well as mushroom

Title: Determining Phenotypes of Crosses Between Drosophila Flies Ameena Ahmed, Ishana Fleurant, Aleksandra Drozdziel, and Chelsea Kornfeld. Abstract The purpose of this experiment is to determine phenotypes of 2 separate crosses between Drosophila flies and compare the outcome to the expected results, which should fit the 9:3:3:1 ratio, set up by the law of independent assortment. A vial with a set of 3 male flies with specific characteristics were mated with 3 female flies with distinct characteristics

The meaning of Arthropod is an invertebrate animal that has a segmented body, jointed limbs, and commonly has a chitinous outer shell. This Phylum is specific to insects, spiders, arachnids, crustaceans, and myriapods. Drosophila Melanogaster is a species that comes from Phylum Arthropod. The common name for this species is fruit fly. If you are not sure what a fruit fly is, it is a 3mm long fly that is usually seen around spoiled fruit. Why are fruit flies even significant to biologists? They are

1. Describe risk assessment in genetic counseling Genetic risk should be estimated as precisely as possible as it is an important component of genetic testing and counseling, and for family decision making. It is always good to take out extra information from pedigree charts and genetic testing as it can improve the accuracy of risk assessment drastically. The risk can be calculated using Bayesian analyses. Among populations, families or individuals within the same family have significantly different

method, the traits of the males and females were observed. 7 red winged male and 7 red winged female, F1 generation flies were selected from the F1 generation. The medium for the next batch of flies was made by pouring 10 ml of formula 4-24 Instant Drosophila Medium to a clean vial and adding 10 ml of tap water, 4 grains of yeast and a strip of netting to crawl on when awake. The selected 14 fruit flies were transferred into prepared vials. The vials were marked and labeled and stored in an average temperature

vs. Black. We hypothesized that Drosophila Melanogaster would prefer dim light over all colors, especially blue and black due to the fact that they have very short wavelengths which are lethal to the flies. However, results from 2 out of our 5 trials did not support the hypotheses. In the initial trial, Dim vs. Dim, we expected an equal number of flies on each side of the chamber due to the same lighting on both sides. Yet, the results proved otherwise, as Drosophila Melanogaster showed a strong preference

Kaitlin Fair Dr. Andrew Genetics- Bio 222 Drosophilia Melanogaster and their sex-linked trait: eye color Introduction(1-2 pages): Drosophila Melangoaster, fruit flies, are a model organism for sex linked traits such as eye color. This species reproduces efficiently. Males can mate with multiple females throughout their life, while a female fly stores the sperm she receives forever. Because a female fly is only able to reproduce once in her lifetime, when experimenting with flies it is typical to

Testing Genetic Drift and Natural Selection in Drosophila melanogaster Materials and Methods The materials and methods are from (Welsh and Thompson 2016) Wild-body type (tan) and ebony body type Drosophila melanogaster were prepared before this procedure by chilling the flies to leave them immobilized . Drosophila melanogaster is an ideal organism for this experiment for they can be easily cultured. They can be cultured in less space in a temperature of 21-25(degree Celsius find degree sign)

effects of light on Drosophila melanogaster, which have been extensively studied as a model organism for human genetic diseases. Light has been shown to support all life forms by providing a living organism with energy and food. Therefore, the fitness of the two Drosophila melanogaster phenotypes (sitters and rovers) under two different settings (one with light and one without light) was tested. We hypothesized that the availability of light will affect the survival rate of the Drosophila melanogaster for

After leaving out the pheromone fly trap for about a week for fruit flies to come and eat the methyl eugenol, the traps were then collected and the number of fruits flies were counted. When comparing the original methyl eugenol (own group) and the eugenol control, the null hypothesis was that there is no significance or correlation between the amount of fruit flies collected with different amounts of methyl eugenol used in comparison to the eugenol control, which contained no methyl eugenol. The

Abstract The different factors that contribute to the eye pigmentation of Drosophila melanogaster are based on proteins that are likely to influence in the fly's eye pigmentation. The experimental procedure was done to learn more about Mendelian Law of Segregation and to determine whether or not two different fruit fly crosses for the 3:1 phenotypic ratio. In this study, the lab group examined the eye pigmentation of Drosophila melanogaster’s under a dissecting microscope to determine the phenotypes

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. The flies in vial 1A will demonstrate

Genetics is all around us. One may observe heredity in many different forms. For example, Laboratory Three: Dihybrid crosses using Drosophila melanogaster, was assigned to observe Fruit Fly phenotypes. Around the 1920s, Thomas Hunt Morgan experimented with this same species to detect mutations and discovered X-linkage, various recessive and dominant phenotypes, and also that genes are located on chromosomes (Klug, et al. 2013). In the experiment that took place over the course of a few weeks

The purpose of this experiment was to determine if there is natural selection against blind, white-eyed male Drosophila melanogaster, as well as if there is any interplay between selection and drift occurring in populations of different size. This was done by creating and monitoring both small and large populations and placing them in an environment with regular light or complete darkness. It was predicted that natural selection would occur against white-eyed males in the light trials, but would

In lab we were introduce to the Fruit Fly Genetics experiment. We had to observe, and learn the life cycle and the stages of the fruit fly. Throughout the experiment we had to learn the different traits of males to females, white from red eyes and miniature from normal wing size. In this experiment we were paired up in partner's, and each of us had to separate males flies from females. The way that we were able to determine their gender was by knowing that males have black sex combs on their front