Case Study Of Drosophila

The experiment was performed on February 2nd 2016 at the University of Calgary in a Biological Science laboratory. The experimental procedure was done in a group of four students.

Drosophila Melanogaster, commonly known as fruit flies, are highly important model organisms in pertaining to biological research. The logic behind their recurrent use is due to their: easy culture in the laboratory, brief generation time, and ability to produce large numbers of offspring. In this report, we created isolated virgin D. Melanogaster from the original three populations we were given and then created crosses between them. Upon observation, we noticed an unusual mutant that arose from two of the three created crosses. We suspected that this genetic mutation had previously been discovered and named.

Jack J, DeLotto Y. Effect of Wing Scalloping Mutations on Cut Expression and Sense Organ Differentiation in the Drosophila Wing Margin. Genetics. 1992;131(2):353-363.

Environmental conditions are sometimes appropriate for the evolution of numerous species from a common ancestor. Evolutionary, or adaptive, radiations happen when a large number of species descend from one lineage. This phenomenon usually occurs when a population of one species colonizes an area with many available ecological niches and when the rate of speciation is greater than the rate of extinction in a given area. Adaptive radiations have historically taken place after mass extinctions and on newly formed island archipelagos, because these incidences create conditions where new species can fill open ecological niches. Unlike the mainland, ecological niches are available on new island systems. These island species adapt to new environments

Heterozygotes, which have the wild type phenotype, have normal sight which gives them the advantage of finding a mate and have a better success with attracting a mate with their courtship song (Kyriacou et al, 1978). The male heterozygous Drosophila had a better advantage at mating than the homozygotes, which were the ebony, and therefore we predict there will be more wild type by the end of the experiment.

The Drosophila melanogaster is one of genetics most studied organisms. This is due to the Drosophila melanogaster being an excellent model organism. The Drosophila melanogaster has a short lifespan and is genetically similar to humans (Adams 2000). This experiment had three major goals. The first goal of this experiment was to determine which eye colors, body colors and wing type are dominant or recessive. The second goal was to determine if the gene for eye colors, body colors and wing type are on an autosomal or a sex chromosome. The third goal was to determine if eye colors, body colors and wing type are physically linked or independently assorting (Morris and Cahoon). First

A cross produces 2/12 ey+ ey ey, 2/12 ey+ ey+ ey, 2/12 ey ey, 2/12 ey+ ey, 1/12 ey ey ey, 1/12 ey ey ey+, 1/12 ey ey+, 1/12 ey+ ey+ .

Drosophila melanogaster were studied to test whether evolution occurred in the population by analyzing the genotype and allele frequencies for 7 weeks. If evolution was occurring, then the aforementioned frequencies would change instead of remaining constant as they would if no evolution was occurring. The hypothesis of this lab is that evolution will occur due to the violation of three Hardy-Weinberg principles. This lab was carried out using 20 flies to start, 5 each of male and females that were homozygous ebony and wild type. New culture vials were made every other week when the flies were scored. On alternate weeks, the adults were transferred to a fly morgue. The results showed that the ebony allele frequency increased and the wild type

Upon analyzing the mutant Drosophila melanogaster and comparing it to its wild type counterpart, it was determined that the allele of the mutant gene phenotypically alters eye color. There are no other physical differences concerning bristles, wing shape, body color, wing venation, nor eye shape. Wild type male and female D. melanogaster have vibrant orange eyes with the addition of a black, pseudo-pupil in the center (Figure 1. C and D). Their eye color appears to darken with age. Male and female wild type eye color does not vary significantly. Mutant male and female D. melanogaster have a significantly darker eye color than the wild type flies. The color resembles a reddish shade that resembles wine or oxidized blood (Figure 1. A and B).

The purpose of this conducting this lab is to see how the rocket can be changed physically to make it fly higher up after being launched. Not only is the rocket going to fly higher but also have to test to see if there is a way to thoroughly protect an egg after landing to keep it from cracking/breaking. Research on the average height a rocket flies based on the PSI used showed that the higher the PSI the higher it tends to fly.

I assist a graduate student in a biology lab working to find genes and mechanisms involved in sperm competition between different strains of Drosophila. I have worked ten hours a week this summer and will continue with those hours during this coming school year. My tasks include identifying and separating individuals by sex, setting up crosses and dissecting males to determine their fertility. Much of what I do requires fine motor skills, attention to detail and a great deal of patience because there are countless tiny flies and larvae to handle. The experiment has proven very educational, and I have learned much about fly genetics and evolutionary processes.

Drosophila melanogaster commonly known as a fruit fly is an oviparous animal with a short generation time of approximately two weeks, during this time the insect hatches into a larva and goes through the developmental larval instar stages, and finally evolves into an adult fly. This species has become an important resource for biologists to better understand different organisms, such as other insects, and even humans. By understanding a simple living organism such as a fruit fly, researchers have been able to comprehend more complex organisms and their behaviors, brain processes, development and other important details. Some examples of the previous research done on this species have provided information about the sense organs in animals

The studies in Drosophila melanogaster have helped scientists to have better understand about genetic and scientifically discover the variety of human diseases from mutations. After observing under 50X magnification, the differences between the female and male unknown mutants 651 are that the shape of male’s pseudopupils are larger than female’s and the volume of bristles and hairs on male’s notum are greater than female. In addition, the larva of wild type is a little larger in length and width than the larva of unknown mutant while the color of mutant’s larva is a bit whiter than wild type’s. Most of the distinguish differences of phenotype between wild type and unknown mutant are found on the thoracic notum, which includes the arrangement,

Drosophila melanogaster, often referred to as the fruit fly, is an interesting and dynamic insect that provides humanity with important information in the study of genetics. The biological community is extremely devoted to acquiring more information about the genetic process in order to improve the health and existence of humans. The fruit fly may seem like an insignificant specimen; however, it has a surprising number of parallels to the human genome. Humans have 46 chromosomes in which 23 are gametes involved in the reproduction process. Although, the fruit fly has only 4 chromosomes they behave very similarly to humans. This insight has led to new research and development that is continuously explored by scientists all over the globe.

After the second Drosophila cross, the phenotypes of 100 F2 Drosophila were scored, rather than 200 phenotypes as described in the GENE222 Laboratory manual. 100 phenotypes were scored because less than 200 Drosophila were produced by the second cross, and 100 phenotypes was a convenient amount for further analysis.