Fruit Fly Lab Report

The purpose of this experiment was to determine the F1 genotype of fruit fly traits using the phenotypic ratio of the F2 generation and to express these results of the unknown cross through a Chi-square model and Mendelian genetics. After the experiment, it was found that the parents held a heterozygous genotype through using the Chi-square model, and that the observed and expected values fall within the Chi-squared value which also falls into the p-value. The Chi-squared value was 5.64, the degrees of freedom was 3 and the p-value was between .05 and .2, which supports the failing to reject the null hypothesis. The results also yielded the expected 9:3:3:1 ratio showing how different alleles combine and which ones are most prevalent. Using
Looking at all of the fruit flies, there is no possible way for the parent flies to be homozygous. If the parent flies were homozygous, both the F1 and the F2 phenotypes would be the same holding a 1:1ratio, instead of the 9:3:3:1 ratio that was observed. The purpose of this experiment was to determine the F1 genotype of fruit fly traits using the phenotypic ratio of the F2 generation and to express these results of the unknown cross through a Chi-square model. After taking data with the Chi-squared value of 5.64, the degrees of freedom were 3 and the p-value was between .05 and .2, it is confident to fail to reject the null hypothesis, which leads the experimenters to believe that the observed phenotypic ratio does significantly deviate from that expected under the assumption of Mendelian inheritance. In the future, exploring more complex animals other than fruit flies, such as mammals or reptiles, would make this experiment a little more difficult, but more interesting as well. Without Mendelian genetics, it would be much more difficult to predict traits in organisms across the living