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

Drosophila Work Essay

1147 words - 5 pages

Vial1 contains the first filial (F1) generation of the offspring of the parents which were crossed, wild type (+/+) x vestigial (v/v).


Alleles |
v |
v |

+ |
+v |
+v |
+ |
+v |
+v |




Fig1. Shows a monohybrid cross examining a single trait for the F1 generation

Using this monohybrid cross, we are able to predict as best we can, the phenotype of the offspring. Here we see that the wild type phenotype will be present 100% of the time (fig1).

From the results gathered on the day, observations showed that there was only one phenotype present on ...view middle of the document...

Alleles |
+ |
c |

+ |
++ |
+c |

+ |
++ |
+c |
The ratio which I gather from vial two was 12 wild type to 5 mutant; which account to approximately 71 %wild type: 29% mutant phenotype. The class results showed a ratio to of (3:1). The results which I gathered do not exactly account for a 3:1 ratio, however this could have been due to some experimental errors. If this experiment was to be repeated, only one person should do the counting instead of two in every vial.

Comparing my result and the class results, to the expected pattern from the monohybrid crossed, with two F1 heterozygous alleles (+/v) x (+/v) to produce the F2 off springs, I think that the proportion of wild type to the mutant flies in vial 2 is what I expected. That the ratio of wild type to mutant was 3:1. For every 4 flies, one would be mutant and three would be wild type, this meant that there was a 25% mutant phenotype in vial 2 according to the monohybrid inheritance pattern.

In this vial we see three genotypic ratios, 1(+/+): 2(+/v): 1(v/v). The dominant allele in this cross is + (wild type). Therefore we have three of the offspring which will have a phenotype (wild type) as they carry one of the (+) alleles which is masking the recessive (v) allele (Brooker et al., 2014). However due to this cross being done with two heterozygous parents, we see one of the offspring having a recessive trait (v/v), vestigial phenotype (Omics international, 2014).

Wild type (+/+) x curly (+/c) parents were crossed and in vial 3 contained the F1 generation of offspring.

Fig 3. Shows a monohybrid cross examining a single trait (dominant cross).

The ratio which I gather from vial 3 was approximately; 1 wild type phenotype: 1 curly phenotype (mutant). The class results also showed an approximate ratio to my individual result (1:1).

Comparing my result and the class results, to the expected pattern from the monohybrid, I think that

the proportion of wild type to the mutant flies in vial 3 is what I expected. That the ratio of wild type to mutant was 1:1. Therefore, for every 4 flies, two would be mutant and two would be wild type, this meant that there was a 50% mutant phenotype in vial 3. This is due to the parent with the dominant phenotype being a Heterozygous (+/c), this will produce half of the offspring mutant (+/c) and the other wild type (+/+). If the mutant was a homozygote (c/c) as it’s the dominant phenotype, this would have produced all mutants, whilst crossed with the wild type (+/+) (Brooker et al., 2014).

The proportion of mutant flies in the F2 generation of the...

Other Papers Like Drosophila Work

Mitochondria Essay

2533 words - 11 pages are linked to one another by narrow connections. (Karp 2008) These two membranes of the mitochondria divide the organelle into two aqueous compartments. The first compartment is found within the interior of the mitochondria and is called the matrix. This and the inner membrane are the two parts of the mitochondria that do most of the work. (Karp 2008) The matrix contains several different enzymes, ribosomes, tRNAs, and DNA molecules. The

Myself and Nation Essay

2508 words - 11 pages second study conducted within the new study was done on Drosophila fruit flies.  A line of genetically engineered fruit flies were created without the piezo protein.  The larvae of these flies showed a loss of responsiveness to mechanical stimuli-that should cause pain, yet responded normally to other kinds of stimuli.  Some of the larvae born without the piezo protein were reinstated with dpiezo.  These larvae demonstrated normal sensitivity to

Skin Cancer

1953 words - 8 pages human beings. Other influences on the risk of developing skin cancer include an excessive exposure to ultraviolet rays. Skin cells are always being overwhelmed with radiation and certain genes are responsible for fixing the damage. When a gene called ‘patched 1’ (also known as PTCH1) is inactivated it causes an increase in excessive cell growth, also known as cancer. Patched 1 was found in a fruit fly called Drosophila melanogaster and is located

Predator - Prey Relationships

4419 words - 18 pages 7,000 coyote were removed. When the predators were removed, the population jumped up to 100,000 deer by 1924 (Boughey, 1968). This population crashed in the next two years by 60% due to overpopulation and disease. Without predators, the prey could not establish a stable population and the land supported a much smaller number than the estimated carrying capacity of 30,000 (Boughey, 1968). The example can work in reverse; an increased number

Gene Expresion

5233 words - 21 pages 1. DEFINATION: Nuclear receptors are a superfamily of ligand activated transcription factors that modulate specific gene expression. Currently there are 100 nuclear receptor are identified[1]. 2. INTRODUCTION: In the field of molecular biology, nuclear receptors are a class of proteins found within other molecules. In response, these receptors work in concert with other proteins to regulate the expression of specific genes thereby controlling

Freedom And Responsibility

2141 words - 9 pages Built within the Constitution of the United States are specifically defined freedoms that are guaranteed to all citizens. Conversely, with every constitutional freedom there comes a corresponding responsibility. On September 25, 1789, the state legislature’s twelve proposed amendments were transmitted by congress, the first two dealing with congressional representation and congressional pay. The following numbers three through twelve were

Hate Crime Laws

2348 words - 10 pages On June 7, 1998, 49-year-old James Byrd Jr. of Texas accepted a ride from three white men, who then beat him severely, urinated on him, chained him by his ankles to the back of their pick-up truck, dragged him for three miles into the countryside, and dumped his corpse in front of an African-American cemetery (Graczyk). A little over a year later, a jury sentenced ring leader John King to death by lethal injection (“Man Executed for Dragging

Rational Emotional Behavior Therapy Case Study Conceptualization And Treatment Plan

2140 words - 9 pages health (Murdock, 2009). REBT recognizes the interaction of emotions, beliefs, and behaviors through the ABC model and the therapist will work to help Sarah understand the interrelatedness of these aspects (Murdock, 2009). It is important that the therapist help Sarah understand the process and philosophy of REBT, as the majority of patient doubts have been “traced to misperceptions about REBT” (Dryden, Hurton, Malki, Manias & Williams, 2007, p. 86

Holidays In Albania

1636 words - 7 pages Have you ever thought about having exciting and incredibly cheap vacations? Albania might be the right choice. According to My Travel Guide, Albania is ranked the fourth among ten places worth visiting in Eastern Europe (“Top 10 Eastern European Destinations”). One can encounter three kinds of vacations in this Mediterranean country: winter, summer, and cultural. The ideal places to spend your winter vacations are the Albanian Alps. They are

A Heart Of Darkness

1748 words - 7 pages Leopold's rule. He treated the people cruelly and forced them to work long hours at such jobs as collecting rubber in forest and building a railroad. Many of the people died as a result of the harsh treatment”( http://www2.mvusd.k12.ca.us/eett/syoung/WDSTF/bc.htm). The Thames is depicted as being peaceful and tranquil while the Congo is its antithesis. Both are associated with darkness; however, the Thames has “conquered” its darkness and now is

The Aspects Of Vulnerability Among The Exploited In Medical Research

2287 words - 10 pages Essentially, everyone is in some state of vulnerability. However, some of us are more susceptible to harm due to our vulnerabilities. The susceptible are the individuals with the greatest risk. These individuals risk the loss of their autonomy, and maybe even their lives. Vulnerable populations can be found in every subset of society. However, as previously mentioned, there are some vulnerable populations that are at an even greater risk than

Related Essays

Embryonics Essay

1379 words - 6 pages will discuss the embryonic cells and pronucleus taking into accounts their application to human cloning. Caenorhadditis elegans and Drosophila melanogaster will also be discussed together with application of Hardy-Weinberg equilibrium. Embryonic stem cell has been applied in human cloning through human cloning for biomedical research whereby cloned cells are produced and used in individual patients suffering from diseases like Parkinson’s

Mice And Men Essay

974 words - 4 pages work in Drosophila extracts, USA. liver, spleen, kidney and pancreas.1 plants, and C. elegans, a plausible model These results suggest a RNAi gene ther- for RNAi gene silencing

Targeting Specific Pdz Domains Of Psd 95: Structural Basis For Enhanced Affinity And Enzymatic Stability Of A Cyclic Peptide Dayong

4006 words - 17 pages loading buffer containing 4 mM DTT was added, the samples were boiled for 5 min, and resolved on an 8% SDS-PAGE. Gels were then Western blotted, immunostained with α-PSD-95 monoclonal antibody (Upstate), and visualized with Supersignal West Pico chemiluminescent substrate (Pierce). The blots were analyzed using ImageJ (NIH) to calculate densitometry units and graphed with SigmaPlot (SPSS).AcknowledgmentsThis work was supported in part by

It Is Acceptable To Use Animals For Resarch

2431 words - 10 pages animals are being used in medical research and experimentation is this because genomics of most of the animals is similar to that of human such as “fruit fly (drosophila) share 60 percent of their genome with human, mouse have 70 percent, cows (Bos Taurus) carry 80 percent of human genome and mouse have almost 99 percent analogous genes in human.” (Europa Forum) And this is why mouse is used in most of the experiments. As the advancement in