SC BIOL 101 - Drosophila Melanogaster (12 pages)

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Drosophila Melanogaster



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Drosophila Melanogaster

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Pages:
12
School:
University Of South Carolina-Columbia
Course:
Biol 101 - Biological Principles I
Biological Principles I Documents

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BIO 101L EXPERIMENT 9 DROSOPHILA MELANOGASTER MENDELIAN GENETICS FOR AN UNKNOWN DIHYBRID CROSS USING AN F2 GENERATION TO DETERMINE P1 GENERATION Report Author Cameron G Kahn Report Submitted 12 November 2014 Data Collected 29 October 2014 Laboratory Partners Nilesh Syam Taylor Hollingsworth Teaching Assistant Amanda Havighorst Author s Affiliation Department of Chemistry and Biochemistry University of South Carolina Columbia SC 29208 I pledge that my work meets the standard of the USC Honor Code ABSTRACT This experiment was performed to study phenotypes of the Drosophila melanogaster which is simply a red eyed fruit fly By studying phenotypes of the fly a better understanding of genetics can be accomplished In the case of this experiment the phenotypes being studied were the wild type eyes red sepia brown eyes wildtype wings and the shriveled wings both Vestigial and Apterous in the F 2 generation Using the offspring observed from the F1 parent generation the parental P1 generation flies mated at the supply company was determined to be homozygous dominant and homozygous recessive The observed number of flies for each phenotype was compared with the expected number for each phenotype using Mendel s Law to see if 1 the results followed Mendelian Genetics The null hypothesis was that the results from the class data collected for the observed number of flies for each phenotype would follow Mendelian Genetics A chi squared statistical test was performed and the results showed that the observed data did not follow the 9 3 3 1 ratio as described by Mendelian Genetics therefore the null hypothesis was rejected because the data observed was significantly different at the 95 confidence interval than what was expected using Mendel s Law which concludes that the results from the experiment could have been due to random error INTRODUCTION The drosophila melanogaster is a species of fly that is heavily studied in biology to understand the basics of genetics development and



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