A Study of Inheritable Traits in Fruit Flies

6. Analyze results - Graph the data from Table 4 and describe what your graph looks like (you do not have to submit a picture of the actual graph!).

Throughout this experiment a number of random and procedural errors were apparent; these errors could have affected the results of the experiment in a number of ways. One experimental error that occurred during the experiment was that some flies became stuck in the food source and died. The main cause of this was the fact that the fly vials were stood up (vertically) before the flies had fully recovered from the anaesthetic. This could be overcome in future experiments by ensuring that the vials are kept horizontal until all of the flies fully recover from the anaesthetic.

1. Are any of the lab values in Table 1 out of normal range? Do you see some that are too high or too

The parents are both homozygous. The homozygous dominant would represent the wild type. And the homozygous recessive would represent the other fly parent of a different strain. The F1 generation would consist of 100% Wild Type but they would all be heterozygous in carrying the recessive gene.

To set up this experiment, two twenty-five gallon aquariums, 3 petri-dishes, 200 flies, rotten bananas, and yeast were used. The bananas chosen to be an accelerant for the growth of the yeast and were frozen so they would be easier to cut. The yeast was used because the drosophila melanogaster prefer this as a food source.  The vestigial and wild type flies were sexed (to determine their sex), sorted, and counted.  An initial population size of 100 total flies was decided so that it would be easier to determine the phenotypic percentage of the total population. Fly paper was placed in one of the sets of cages to impose a method of natural selection as well as the sexual selection which is being solely tested by the other set of cages.

Analyze results - Graph the data from Table 4 and describe what your graph looks like (you do not have to submit a picture of the actual graph!).

6. Analyze results - Graph the data from Table 4 and describe what your graph looks like (you do not have to submit a picture of the actual graph).

The motivation of this lab report is to use Mendel’s Laws of Inheritance to analyze and predict the genotypes and phenotypes of an offspring generation (F2) after knowing the genotypes and phenotypes of the parent generation (F1). The hypothesis for this experiment is that the mode of inheritance for the shaven bristle allele in flies is autosomal recessive in both male and female flies.

It would be expected that the mutant F1 flies would be heterozygous for the allele responsible for the grounded trait. If two F1 flies were mated, the percentage of flies that would be expected to be wildtype in the F2 generation would be 25% mutants given that the mutant allele (ap) is predicted to be recessive and, leaving 75% to be wildtype (ap+).

The first key point is the brain and how dopamine may affect important brain function. In chapter one our reading begins with the human brain, walnut-shaped with a weight of 1.3 kilograms. The brain is a network on neurons with infinite number of path for neural signals. The views discuss an experiment using fruit lies have dopamine and how it acts on their brain through dopamine receptor molecules.

2. Which of the following values from Table 1 tells us about variability of the scores in a distribution?

we said goodbye and placed them in the fly morgue. We allowed the F2 larval

Charles Darwin was a famous scientist whose most famous studies were the evolution of man and all other creatures. Darwin realized that certain species became extinct because they were not both strong physically and mentally, and he explains his theory which is called natural selection, and later claimed the phrase “Survival of the fittest.” This phrase can be seen through war as well as the aftermath of a war. World War II proved that the strongest bodies and minds survived, and in England the strongest had to stay strong for more than a decade after the war because they had to rebuild everything, including the way society acts. Many literature pieces were written in this time period, and none were more famous than William Golding’s

This experiment looks at the relationship between genes, generations of a population and if genes are carried from one generation to another. By studying Drosophila melanogaster, starting with a parent group we crossed a variety of flies and observe the characteristics of the F1 generation. We then concluded that sex-linked genes and autosomal genes could indeed be traced through from the parent generation to the F1 generation.

Research on insects has been significantly beneficial in revealing new insights in different areas of biology. Drosophila melanogaster has served as a leading insect model since last 100 years and studies have confirmed that though flies and human do not look alike, most of the key biological processes and molecular mechanisms which control development and behaviour are evolutionary conserved between these species. It is no surprise that the fruit flies have also been the model organism to study the circadian clocks since the 1950s with the initial work of C. Pittendrigh studying eclosion rhythms and its dependence on light. For the organism to be used as a model for studying circadian rhythm: 1) It should possess a functional endogenous clock with a period of about 24 hours, 2) It should be able to