This website uses cookies to ensure you have the best experience. Learn more

Drosophila Essay

806 words - 4 pages

I. Introduction.
(Start with drosophila as a model organism)
Drosophila melanogaster (D. melanogaster), the fruit fly, has proven to be an invaluable model organism that’s been used to study many genetic phenomena, including X-linked inheritance, gene mapping, and autosomal inheritance [1]. D. melanogaster has been used as a model organism for over 100 years, and its genome (containing ~14,000 genes) has been well-studied, thus making it ideal as a model organism. As with most of the long-established model organisms, practicality is key. D. melanogaster has a simple diet, and the life cycle is relatively short, so large-scale crosses can be followed through many generations [2].

(How drosophila will be used in crosses)
As previously mentioned, D. melanogaster has been used extensively in genetic studies, which is what we plan to utilize them for in our lab. There are many ways that fruit fly DNA can be mutated to create visible traits, called phenotypes [3]. In our lab, we used the strains lobe, eyeless, sepia, white, and wild-type, we to performed crosses and reciprocal crosses to determine if the corresponding phenotypes were autosomal-linked or X-linked traits. The Lobe strain exhibits a smaller eye than wild-type, caused by a mutation in the optic lobe of the brain. The eyeless mutation makes it so D. melanogaster does not make eyes during development [3]. Lastly, the sepia strain of D. melanogaster exhibits a sepia pigment in the eyes of the organism [4], while white strain has a deletion of genes responsible for making the red pigment observed in wild-type eyes, so appear white. It should be noted that the white mutation is located on the sex chromosome, meaning males and females have different numbers of copies of this gene. [3] By utilizing these crosses and examining the F1 generation phenotypes, we should be able to label each strain successfully and use the knowledge gained from the crosses in future work.
(Touch on meiosis, as it’s required for genetically nonidentical gametes for crosses)
Meiosis is an important player in drosophila genetics and one reason drosophila is an excellent model organism for studying genetics. Many other model organisms, such as C. elegans, are hermaphroditic and produce genetic “clones” of themselves, and therefore are not as suitable for studying genetics as drosophila, which undergo sexual reproduction: meiosis. The process of meiosis produces four genetically unique cells, each with half of the number of chromosomes as in the parent [5]. ...

Find Another Essay On Drosophila

Examining the Genetic Inheritance of Apricot Eyes and Wingless Mutations in Drosophila

2753 words - 11 pages Examining the Genetic Inheritance of Apricot Eyes andWingless Mutations in DrosophilaChris WahlGenetics (Biology 170)Introduction:We sought to gain further knowledge on the genetics in traits for the organism, Drosophila. Further, we sought to observe the mode of inheritance, number of genes and whether the traits we were observing were X-linked or autosomal traits. We would gain this information by the use of controlled breeding and Mendelian

Evolution of Female Resistance to Mate-Harm in Drosophila Melanogaster

828 words - 4 pages This experiment studied the evolution of female resistance to mate-harm in response to sexual conflict. Previous studies had touched on this topic. Most of them had come to the conclusion that populations that are centered on the male-mating/female-childbearing gender-specific definitions of success often lead to a cascade of problems. Male success is defined by the number of females they can mate with, often leading to harsh competition

The Drosophilia Hydei

1041 words - 4 pages 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

A Study Of Inheritable Traits In Fruit Flies

1634 words - 7 pages 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

Confocal Microscopy Lab

912 words - 4 pages , 1995). The intensity of the red light seen is proportional to the amount of filamin present and the intensity of the green light seen is proportional to the amount of actin present in the sample of Drosophila melanogaster ovaries. Confocal microscopy is able to produce images that are very free from interference. The confocal pinhole allows the microscope to reject out of focus fluorescent light (Weeks, 2003). This means that the

Paper

786 words - 4 pages manipulate genetically. It shares fundamental characteristics, such as DNA and messenger RNA, with all other organisms. The value of E. coli in recombinant DNA makes it a good model organism for students to study the genetic material. A third is Drosophila Melanogaster, a model animal used which was used to study development genetics. Research where the aims are to understand human genetics and developmental processes. Moreover, it has a very long

Sex Traits

2342 words - 9 pages Abstract Drosophila melanogaster were mated in labs 8, 11, and 13 to illustrate how the sex-linked genes are passed on from one generation to the next. This was accomplished by crossing different genotypes. In order to do this, the flies first had to be put to sleep, then counted under a dissecting scope and finally separated in to groups of red-eyed females, white-eyed females, red-eyed males, and white-eyed males. For the F1 a

evolution in networks

1995 words - 8 pages systems-based manner in the context of metabolic networks as a whole as opposed to studying individual genes or proteins. This can be extended into a comparative analysis due to data availability for several species. This paper aims to review and compare the relationship between molecular evolution and metabolic network topology in Drosophila [1], Yeast [3] and Primates [2]. In order to do so, a number of terms and concepts that these papers use must

Fruit Fly Experiment: Conclusion

2192 words - 9 pages small; this may have affected the accuracy of the experiment, preventing the hypothesis from being tested properly. This could be overcome in future experiments by breeding more flies and performing multiple trials.The virginity of the flies used in this experiment was guaranteed. However, it is possible, that the female flies were not virgins and had mated with other flies previously. Female Drosophila flies have seminal receptacles that collect

Heredity and Sex

1722 words - 7 pages Mendelians seemed unable to achieve the predicted 1:2:1 ratio and random segregation factors unless they restored to selective breeding. Each group seemed to have unresolved difficulties. (477) Next comes into play Morgan’s research on Drosophila. Morgan was educated at the University of Kentucky, where he earned his bachelors of science in 1886, and continued his education as John’s Hopkins University, where he was trained as a

The Hox Genes

1166 words - 5 pages The Hox genes are a set of related genes that code for transcription factors involved in determining the general body plan of an organism along the anterior to posterior axis. One unique feature of the hox gene is that its function and presence is highly conserved in a wide range of species, including the model organism Drosophila, amphibians, and mammals. Because of such a high level of homology amongst species where this gene cluster exists

Similar Essays

Drosophila: Fruit Fly Lab Essay

1600 words - 6 pages The history of fruit flies is considered a tradition. Research of these flies initially entered labs 100 years ago. Thomas Hunt Morgan, who lived from 1866 to 1945, was the founder of drosophila genetics. Thomas preformed his research in Morgan lab at the Columbia University in 1910. Here was when they found a famous mutation, know as the white-eyed fly. Quite an accomplishment was this discovery, but the end of the 1980's there were 3,000

The Genetics Of Drosophila Fruit Flies

753 words - 3 pages The Genetics of Drosophila Fruit FliesIntroductionThe Drosophila Melanogaster, typically known as the fruit fly, is a widespread species used in genetic laboratory studies. Using fruit flies have many advantages for this type of study. Drosophila fruit fly lays hundreds of eggs after just one mating, and has a generation time of two weeks. The fruit flies also mature quickly and don't require too much space. The life cycle of fruit flies has

Evidence Of Mendelian Inheritance Patterns Seen In Drosophila Melanogaster

1278 words - 5 pages Drosophila melanogaster is a fruit fly that is valuable to biological research, particularly in genetics and developmental biology. (Manning, 1997) For the purposes of this experiment D. melanogaster was used to examine Mendelian inheritance patterns commonly seen in the study of genetics. The final offspring results would show whether the traits of the fruit flies are a product of independent assortment, which is a Mendelian pattern of

How Is Sex Determined In Drosophila And Humans?

2053 words - 8 pages eggshell proteins in the follicle cells surrounding the Drosophila oocyte, in order to produce the large amounts that are needed. Alternative splicing during transcription is another possible mechanism of gene regulation, as are effects caused by sequences in the mRNA after transcription, or processes involving the actual polypeptides produced through translation.The determination of sex involves these processes in determining the development of