Human Studies Using Drosophila Fly As The Test Organism Essay

Human Studies Using Drosophila Fly As The Test Organism Essay

Length: 1229 words (3.5 double-spaced pages)

Rating: Better Essays

Open Document

Essay Preview

The purpose of this experiment is to conduct genetics studies using drosophila fly as the test organism. Scientists can study the basic biology that is shared by all organisms using a model organism, such as drosophila fly1. Drosophila fly, or more commonly known as fruit fly, has several qualities that makes it well suited for experimental genetics cross. First, fruit flies are low maintenance organisms. They are small in size (few millimeters long), so they occupy a small space and a lot of them can fit in one vial at the same time. They only require a media to feed on. In this lab, instant media was used, which is efficient as it only requires the addition of water to be used. This media contains ingredients that the fruit fly can feed one, such as cornmeal and karo syrup. Second, drosophila flies genetics studies are effective even with a time limitation. This fly has a short life cycle (10-14 days incubated at room temperature), which makes it excellent choice to perform expedite genetic experiments, as the offspring will develop rather fast. Third, fruit flies have a high reproductive rate and numerous genetic variation. The adult female can lay up to 50 eggs per day. With this large amount of progeny, studying the offspring might sound challenging. However, the flies are easily put to sleep using FlyNap, which is an anesthetic mixture that immobilizes the flies for about an hour. Due to the small size of these flies, they are best examined under a microscope after immobilizing them in order to detect their phenotypic variations.
Drosophila fly has four pairs of chromosomes in its karyotype. Three pairs are autosomal, while the last pair of chromosomes are the sex chromosomes. Similar to humans, a XX pair of sex chromosomes...


... middle of paper ...


...een an apterous female (lacking wings) and a wild type (winged) male. The other cross was a dihybrid cross between a red-eyed apterous female and a sepia-eyes winged male. The main question guiding this study was to examine how closely these crosses follow Mendel’s laws, and what phenotypic ratios are expected in each type of cross. It was hypothesized that these crosses will follow Mendelian genetics since none of the involved traits are sex-linked trait. Thus, as a prediction, the expected phenotypic ratio for the monohybrid cross will be 3:1 winged to apterous individuals, and 9:3:3:1 phenotypic ratio in the dihybrid cross for winged, red-eyes as the most common traits. In addition, it was predicted that the phenotypic ratio will be the quite similar in males and females, because these traits are not sex-linked; therefore, they are equally inherited by both sexes.

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

Essay on Courtship Behavior of Drosophila melanogaster

- Introduction “All animals exhibit innate behaviors that are specified during their development.” Drosophila melanogaster (fruit fly) males exhibit complex sexual courting behaviors towards females; these sexual behaviors are only directed from males towards females and are not present in females. The fruitless (fru) gene, which is spliced differently in males and females, has been shown to perhaps have something to do with this male-fruit-fly-attributed innate courtship ritual. This research paper seeks to determine whether this fru gene is a “switch” gene that is “necessary and sufficient to specify male courtship behavior and sexual orientation.” Gene targeting was used to splice t...   [tags: Biology Fruit Fly Mating]

Better Essays
1543 words (4.4 pages)

The Drosophila Fly : Short Gestational Period Essay

- This investigation will approximately take less than 9 months, since the drosophila fly has short gestational period. The first stage of the method is to introduce the chemical MPTP to observe whether this chemical can induce PD. This stage of the practical will take approximately a maximum of one month, as the signs of PD should be start to appear after the first three days, however, the symptoms vary in different organisms, therefore, the time is one month. As mentioned above, the drosophila fly, has a short gestational period, hence, stage 2, which is the trial that determines whether the causing gene is dominant or recessive, will take approximately 4 months....   [tags: Genetics, Gene, DNA, Cell]

Better Essays
1027 words (2.9 pages)

Fly Fishing And Fly Fishing : A Fishing Experience Essay

- Fly fishing is a fishing experience that is unlike any other. Being up in the clear mountain waters just casting away, time flies faster than ever. Even on a day when the fish aren't biting, and it just seems like the nothing can go right, just being there is enough to pass the day. Then there are those days when catching a fish is effortless, every knot that is tied is perfect, and every cast is better than the last one; those are the days that are unforgettable. There have been times when it seems as if it is getting dark after just a few casts....   [tags: Fly fishing, Fishing rod, Artificial fly, Angling]

Better Essays
2212 words (6.3 pages)

The Drosophilia Hydei Essay

- 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)....   [tags: Biology, Fruit Fly]

Better Essays
990 words (2.8 pages)

Wolbachia Symbiont Confers RNA Viral Protection in Drosophila Essay examples

- Wolbachia is a common microbial symbiont that infects insects, including certain species of Drosophila. Bacteria within this genus are capable of propagating their transmission through Drosophila populations by manipulating an infected host’s ability to reproduce (Hamilton & Perlman, 2013). Wolbachia are able to create a selective pressure favoring their transmission by preventing infected fruit flies from having offspring with uninfected flies. Although these microorganisms disrupt host reproduction capabilities, they also confer fitness benefits....   [tags: wolbachia, drosophila, immune system]

Better Essays
808 words (2.3 pages)

Evolution of Learning Ability in Fruit Flies Essay

- Learning & Memory in Fruit Flies Scientists have traditionally viewed learning and memory as "complex traits" in the sense that they are believed to be the net result of various different genetic and environmental factors interacting with one another. As it is not always practical or ethical to use human subjects in research, simpler "model" organisism are often used, and drosophila melanogaster (i.e. the fruit fly) is one of the most well known and well studied in the biological sciences. Abstract Two thousand fruit flies of the species Drosophilia melanogaster were maintained for six months before any experimenting began....   [tags: Biology Fly Drosophila]

Better Essays
1240 words (3.5 pages)

A Study Of Inheritable Traits In Fruit Flies Essay

- A Study Of Inheritable Traits in Fruit Flies INTRODUCTION The Drosophila melanogaster, more commonly known as the fruit fly, is a popular species used in genetic experiments. In fact, Thomas Hunt Morgan began using Drosophila in the early 1900’s to study genes and their relation to certain chromosomes(Biology 263). Scientists have located over 500 genes on the four chromosomes in the fly. There are many advantages in using Drosophila for these types of studies. Drosophila melanogaster can lay hundreds of eggs after just one mating, and have a generation time of two weeks at 21°C(Genetics: Drosophila Crosses 9)....   [tags: fruit fly genetics drosophila melanogaster]

Better Essays
1545 words (4.4 pages)

To Know a Fly Essay example

- To Know a Fly The book, To Know a Fly by Vincent G. Dethier, is about a scientist who fell in love with the fly. Professor Dethier isn’t like most scientists who are idolized for their accomplishments and rejected for the lack of ability to communicate with society. He was known for being an outstanding researcher, and he also had the wonderful gift of communication. The fact that he was fascinated by the knowledge that could be obtained from such a simple species, such as the fly, also made him popular with the public....   [tags: Vincent G. Dethier To Know a Fly Essays]

Better Essays
990 words (2.8 pages)

Essay on Fly-Boys, by James Bradley

- Fly-Boys written by James Bradley, reveals the truth about nine young American World War II pilots that were shot down over the island of Chichi Jima. Out of the nine pilots one was rescued by a submarine. The other eight were captured by the Japanese, and disappeared. After the war the American government, along with the Japanese, covered up everything that had happened on Chichi Jima. Which had meant that the lives of the eight Fly-Boys were erased. Only the American and Japanese governments knew that the pilots survived the war....   [tags: Review of Fly-Boys]

Free Essays
583 words (1.7 pages)

Physics Behind Why Rockets Fly Essay

- In order for any rocket to fly, it must obey some basic rules of physics. No rocket can escape the cardinal rule that the center of gravity must be in front of the center of pressure. Center of Gravity The Center of Gravity or Cg is the point that behaves as if all the mass was concentrated in that one spot. Simply put it is the point at which you could balance the rocket on your finger. The Cg is also the point around which the rocket rotates. This becomes very important for the rocket's stability as you will soon see....   [tags: physics rocket rockets fly]

Free Essays
511 words (1.5 pages)