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Fruit Flies Lab Report

1727 Words7 Pages

Abstract: Drosophila Melanogaster are fruit flies. Previous research has shown that fruit flies are the most logical organism to use to study genetics. This is most likely because they reproduce and regenerate quickly and they are easy and relatively cheap to handle. In our experiment, we observed flies (F2) with unknown phenotypes that we had to discover. After discovering the phenotypes that we were looking for, we tried to figure out the parents (F2), which was the purpose of the experiment. Our experiment results were the total of brown body, normal wing flies(+ +) that we observed was 200, our expected value was 217.2, the total of brown body, vestigial wing flies(+ vg) we observed was 83 and the expected value was 73.375, the total of …show more content…

The chi square table is shown in the results section as Table 2. A chi square test is an analysis test to see if the results of an experiment match the normal dihybrid ratio (9:3:3:1) that is being looked for. Our experiment was to observe unknown flies and based on their phenotypes, then try and discover the genotypes of the parental generation. We hypothesized that both parents were heterozygous making the ratio …show more content…

Also, some of the flies might have gotten trapped in the media and died. Another limitation could have been that the flies were not kept at precisely 25 degrees Celsius, which may have affected their breeding. This may have caused each total of the four phenotypes to be more or less than the expected value. In future experiments, we could try and change the temperature at which the flies are kept in for mating, this could possibly cause the number of offspring to increase or decrease depending on if the temperature was lowered or

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Pm3110 Unit 1 Assignment 1

532 Words | 3 Pages

There was no indication of phenotypic differences between male and female mutant flies ,illustrating that the mutation was not sex linked because both mutant sexes possessed the same eye mutation. Male flies in both wild type and mutant flies consisted of the sex combs in the front of the legs, and dark coloration located at the end of the abdomen. Both classes of female flies possessed a tiger- striped abdomen and a tag-like tip at the end of the abdomen. After confirmation of our eye mutation we can assume that our mutation can be due to either genes rosy, garnet, brown, purple, and sepia because these are genes that affect the pigmentation color of the Drosophila melanogaster. Our mutation may be caused by the transportation of the enzyme xanthine dehydrogenase to the rosy gene which causes a deficiency in the pigmentation

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151 Words | 1 Pages

The hands were washed. Goggles were placed on the eyes for extra protection. A petri dish containing nine pill bugs were obtained and set aside for later use. Two water bottles’ ends were cut and taped to each other creating a miniature tunnel for the pill bugs to crawl in. 50 mL of tap water was obtained in a small beaker and then was slowly moved into the lid of the bottle using a funnel.

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1003 Words | 5 Pages

In this experiment, we are testing whether or not the Isopods' have more of a preference for an environment with syrup or with water. The alternative hypothesis we devised is that if the Isopods are placed in between a syrup and a water chamber, then they will go towards the syrup chamber. This is believed because we believe the Isopods may have an attraction to the sweet scent and taste of the syrup. My group and I observed 10 pillbugs behavior over the span of 5 minutes, recording the number of pill bugs found in each chamber every 30 seconds. We fail to reject the null hypothesis because the chi squared value is 3.6 which is less than 3.84 (critical value at .05).

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Bean Beetle Lab Report

1644 Words | 7 Pages

Introduction The bean beetle also known as the Callosobruchus maculatus, is an agricultural pest insect from Africa and Asia. That can be found throughout the tropical and subtropical regions. The lifecycle of a bean beetles is quite short an adult been beetle lays their eggs on the external surface of a bean. The larva hatches from the egg burrows from the egg through the seed coat and into the bean endosperm without moving outside the protection of the egg.

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Isopod Lab Report

1285 Words | 6 Pages

The χ2 value was 0.012858, df was 3 and hence the P value was less than 0.001 which proves that this result is not a result of random probability and is in fact reliable. In Trial 3, twelve isopods (60%) made the choices of hiding behind the sucrose sponge. The χ2 value was 0.00350342, df was 3 and hence the P value was in between

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Pillbug Lab Report

125 Words | 1 Pages

In our experiment, we examined the behavior of isopods by conducting the experiment based on our hypothesis: “If ten isopods are put into the test chamber, 5 in sand and 5 in soil, which environment will the pillbug prefer.” We hypothesized that the isopods would favor the soil more than the sand because pillbugs are typically found in soil and not in sand. Pillbugs are favored in soil because the natural role of a pillbug is to eat dead and decaying things but, in sand there are no nutrients available for pillbugs. Pill bugs are mostly found in moist environments, due to having gills, gills only function when they are wet so pill bugs will inhabit places in which air holds a lot of water

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Pillbug Lab Report

989 Words | 4 Pages

Abstract: The main focus of this lab is on animal behaviors in terrestial isopods, also known as pillbugs. There are many purposes to this lab experiment. First, these pillbugs are put into four different types of enviroments, also known as chambers, light v. dark, hot vs. cold, moisture vs. dry, and lastly shelter vs. open. In these different chambers, there are 10 pillbugs, 5 placed into each individual chamber and then observed for up to 5 – 10 minutes. In this lab we observed that pillbugs prefer light areas, hot temperatures, moist environments, and lastly sheltered spaces.

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1320 Words | 6 Pages

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877 Words | 4 Pages

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723 Words | 3 Pages

The effects of where these larvae are laid can dictate the fate of these gall fly larvae. A study shows that avian predators can assess a gall 's content prior to pecking it open, preferring galls that are inhabited by gall fly larvae. Bird predation was found to be concentrated near the places with a lot of tree cover where S. gigantean a large centipede tends to pray few attacks occurred in the open where golden rods are prevalent. The study was a field experiment to observe the preference of avian predators on galls in different habitat types and that had different sizes, and heights of galls. It is possible that birds have either learned through experience or evolved through natural selection to choose the more profitable galls (Poff et al. 2002).

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550 Words | 3 Pages

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Fruit Fly Lab Report

1536 Words | 7 Pages

The table seemed slightly imbalanced, and since the flies demonstrate a negative geotaxis, meaning that they resist gravity, the flies may have been influenced to choose one side over another simply by gravitational means. Another error that may have occurred could be the source of light. Though the lab group aimed to maintain an equal amount of light for all sides of the bottles, a vaguely estimated spot was determined and the choice chamber placed there. Since fruit flies also demonstrate a positive phototaxis, this also affects them. The last error that may have occurred due to tape.

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1292 Words | 6 Pages

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1000 Words | 4 Pages

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1062 Words | 5 Pages

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