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Recommended: Fruit fly experiments
Drosophila hydei, commonly known as the fruit fly, is about 3mm long and typically found near unripe or rotted and fermenting fruit. Its body is segmented into 3 different sections and covered in an exoskeleton. It has six legs, two small antennae, one pair of wings (which extend slightly over its rear), and large, red compound eyes. The complex, compound eyes permit D.hydei to see in many directions, allowing it to sense food or potential dangers (Miller 2000). Its eyes are sensitive to light intensity, therefore when shadows approach, signaling danger, the fly will flee or take flight (Demerec 1950; Miller 2000). Its body is a gray-brown color and shaped like an oblong oval, being larger in the front and narrowing toward the back. Tiny hairs cover the entire body, which allow the fly to sense movements in the air. These hairs alert them of disturbances such as approaching predators (Demerec 1950; Miller 2000). The pupae from which the Drosophila hydei hatch are orange-brown in color and are slightly larger than the adult fly. Males and females are differentiated by the stripes on the back of the males, as well as size. Males have broader stripes and tend to be smaller, whereas the stripes on a female are narrower and they will be larger in size (Miller 2000). In order to thrive, a food source of yeast and sugar must be present, as is the case with fermenting fruit. The mouth of D. hydei is specifically shaped in order to take up liquid food sources (Miller 2000).
The range of Drosophila hydei is broad and it exists in many different habitats, ranging from temperate to wet forests (Bateman 1972). Since very cold temperatures are found to have negative effects on insect survival, Drosophila hydei is not found near th...
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...fested by wasp parasites and other harmful microorganisms. Ants also pose a threat to the D. hydei, often carrying away the larvae, destroying their ability to survive (Bateman 1972). The predatorial relationship between ants and D. hydei larvae has a negative effect upon the fly, as they are being used as a food source, whereas the ant benefits, as it is getting a food source. Since Drosophila hydei is prey for so many species, its removal would be detrimental to the many species that prey upon it.
Overall, Drosophila hydei is a unique species, capable of residing in a large range of habitats, temperature and light conditions. Much research has been done to determine the affect of abiotic factors upon these organisms. Differences in temperature and light in particular are shown to affect the behavior, growth and reproduction of the species.
The definition of a hero is subjective. Accordingly, Robert Ray believes the hero is able to be divided into three categories: the outlaw, official and composite hero. In most cases, a hero can be categorized into one of these categories. Through the examination of Jekyll and Hyde, the Batman movie from 1943, and film of Batman in 1989, qualities of the hero will be depicted as a function of time.
The metabolic rate for the cricket and the cockroach will be different when physical stress and temperature changes are present.The null hypothesis is that the cricket’s metabolic rate will be similar to (Blaptica dubia) cockroach’s rate when physical stress and temperatures changes are present.
In the novel “The strange case of Dr. Jekyll and Mr. Hyde” a number of
Queen Victoria, an extremely influential matriarch and key figure in British history, ruled Great Britain for over sixty-three years and continually instilled in her citizens a strong sense of morality. Victoria attempted to virtuously navigate her country through the murky depths of religious skepticism brought about by the Enlightenment and sought for Great Britain to be a bastion of Christianity standing strong against the secular world. Although the British citizens outwardly followed Victoria’s stringent moral code and abstained from pleasure, many citizens, like Dr. Jekyll in The Strange Case of Dr. Jekyll and Mr. Hyde, began to fixate on the thought of pursuing vice, yet remained outwardly pious in order to protect their reputations
The Drosophila live a distinct four-staged life cycle that requires approximately two weeks to reach complete maturity2. The stages are known as egg, larval, pupa, and adult. The egg is a small oval shape, and can barely be seen by the unaided eye, they are hatched the day after being laid. In order for the larva to molt and grow in size it consists of three stages: first instar, second instar, and third instar3; during this process the larvae is preparing itself for metamorphosis by shedding body parts and consuming excessive nutrients. Through metamorphosis the immature fruit fly attaches itself to an object and its outer shell hardens, it then begins the transformation process into an adult. Once the process is completed, the adult is then able to begin the sexual reproduction process within forty-eight hours....
We are testing the metabolic rate of a cricket and (Blaptica dubia) cockroach under physical stress, cold, heat, and lethal heat.
The objective of this experiment is to determine what genes are responsible for the white-eye color in two strains of Drosophila melanogaster, known as the common fruit fly. Drosophila is used as the experimental organism for many reasons which include its small size, easy maintenance, short 10 day generation time, and a fully sequenced genome. The characteristics of the wild type, which is the most common phenotype found in nature, include brick red eyes, long wings, gray/tan body, and smooth bristles. Of course, there are mutations that occur that cause specific traits to deviate from the wild-type phenotype. These traits include wing length, bristle shape, body color, and eye color.
In Robert Louis Stevenson’s novel, Dr Jekyll and Mr. Hyde, Dr. Jekyll, in grave danger, writes a letter to his good friend Lanyon. With Jekyll’s fate in Lanyon’s hands, he requests the completion of a task, laying out specific directions for Lanyon to address the urgency of the matter. In desperation, Jekyll reveals the possible consequences of not completing this task through the use of emotional appeals, drawing from his longtime friendship with Lanyon, to the fear and guilt he might feel if he fails at succeeding at this task. Through Jekyll’s serious and urgent tone, it is revealed that his situation is a matter of life and death in which only Lanyon can determine the outcome.
They are very popular because they have a relatively short life cycle, which lasts about 9 days. This makes it easy to observe multiple generations in a short period of time. The fly’s life cycle consists of egg, larvae, pupa, and adult stages. At each of these stages of development, Drosophila exhibits different phonotypical identities and mutations. The flies that were crossed contained a genetic mutation called apterous. Apterous can be observed by looking for flied that are missing wings. Flies with apterous will not have any wings. If this mutation is sex linked, it is expected that the male population will only be wingless in the F2 generation. If the mutational is autosomal, it is expected that the mutation to normal fly ratio is
Drosophila melanogaster, commonly known as fruit fly, is mainly used as a human disease model organism for genetic analysis. It was during the 20th century that D. melanogaster was considered as the most significant model organism. D. melanogaster is small in size, and it has a short life span with a good reproduction rate, perfect for raising in large number and generation counts for genetics experiments. Additionally, it has a small genome which makes it easier for geneticists to keep track of changes in molecular level. Geneticists were able to uncover many human genetic diseases through the homologous genome of human and fruit flies. It started out with a small group of people led by Thomas Hunt Morgan at Columbia University. Many principles and rules of transmission genetics that are still being used in the generation of today were established in the laboratory of Dr. Morgan. Many animal models were being used before fruit flies. Using the whole-animal as a model set limitations to the types and amounts of experiments can be conducted. The use of Drosophila was able to led geneticists to overcome these limitations with tremendous promises in finding greater quality results. It was Frank Lutz, who wrote many papers on Drosophila, which introduced Drosophila to Dr. Morgan. Many experimental works on plants and animals were carried out on Drosophila instead. Through Drosophila, the discovery of mutation, recombination, relocation of chromosome, and many others were made possible. The cinnabar, cn, gene encodes an enzyme essential in the eye color formation of drosophila. It codes for the enzyme, kynurenine-3-monooxygenase, that is essential in the biological pathway of ommochrome for the brown pi...
Robert Louis Stevenson’s Gothic 1886 novella The Strange Case of Dr. Jekyll and Mr. Hyde can be read in a number of ways through any number of different lenses, which makes for a versatile novella, and an interesting read for just about anyone. It also makes for a great novel with which to learn literary analysis. Using The Strange Case of Dr. Jekyll and Mr. Hyde one can see how Freudian psychoanalysis, though it had not been so developed at the time of the novel can intersect with homosexual undertones, and how the manifestations of the repressed can come to light when the subject of homosexuality is not properly addressed.
The idea of the project was to experiment breeding Drosophila Melanogaster (fruit fly) to figure out if certain genes of that species were sex linked or not (autosomal). A mono-hybrid cross and di-hybrid cross was performed. For the mono-hybrid cross, white eyed female and red eyed male were placed in one vial for them to reproduce. For the di-hybrid cross, red eyed and normal winged flies and sepia eyed and vestigial winged flies were placed in their vial to reproduce. In the mono-hybrid cross the results expected were within a 1:1:1:1 ratio. Expected results similar to the expected desired null hypothesis proposed with what the F1 parental generation breeds. The potential results would have had to have been within the ratios of 9:3:3:1. The results were clear and allowed the null hypothesis to be correct. The white eyed gene in the fruit flies is sex linked. Sepia eyes and vestigial wings are not sex linked and are examples of independent assortment.
The story of Dr. Jekyll and Mr. Hyde is a confusing and perplexing one. R.L. Stevenson uses the devices of foreshadow and irony to subtly cast hints to the reader as to who Mr. Hyde is and where the plot will move. Stevenson foreshadows the events of the book through his delicate hints with objects and words. Irony is demonstrated through the names of characters, the names display to the reader how the character will fit into the novel. These two literary devices engage the readers; they employ a sense of mystery while leading the readers to the answer without them realizing the depth of each indirect detail.
Fireflies talk to each other using light signals, male fireflies fly around giving off species-specific patterns to let the females know that he ...
This review focus on essential systems of detoxification in insects (Terriere, 1984); Cytochrome P450s (Phase I-oxidase), Glutathione S-transferases (Phase II-conjugants) and Carboxyesterases (Phase I-hydrolases).