Thug Life

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Mendelian Genetics in Drosophila Melanogaster: Fruit Fly Inheritance Results Total count for section & course data: Cross | Phenotype | Section 6 Total | Course Total | ap/ap x +/+ | wt | 211 | 2604 | | Apterous | 58 | 824 | | | | | | | | | X(w)X(w) x X(+)Y | wt females | 15 | 707 | | white females | 9 | 597 | | wt males | 13 | 633 | | White males | 13 | 614 | Totals | 760 | 11,754 | Table 1: Total counts for section and course data. Four crosses were experimented to determine F2 generation pooled data: a monohybrid cross, two-dihybrid crosses, and a sex-linked cross. X2 calculations for section data: ap/ap x +/+ | Phenotype | Observed | Expected | (O-E) | (O-E)2 | (O-E)2/E | wt |…show more content…
X(w)X(w) x X(+)Y | Phenotype | Observed | Expected | (O-E) | (O-E)2 | (O-E)2/E | wt females | 707 | 638 | 69 | 4,761 | 7.46 | White females | 597 | 638 | -41 | 1,681 | 2.63 | wt males | 633 | 638 | -5 | 25 | 0.04 | White males | 614 | 637 | -23 | 529 | 0.83 | Totals: | 2,551 | 2,551 | | 10.96 | Table 9: Course total results and X2 calculations for the sex-linked F2 X(w)X(w) x X(+)Y cross. The expected phenotypic frequency was 1:1:1:1 and the observed phenotypic frequency was also approximately 1:1:1:1. The calculated X2 value was 10.96. The total counts of all four crosses for both the section totals and course totals were recorded in Table 1. The phenotypic ratios and X2 vales, and 614 white males (Table 9). Expected values were calculated by multiplying the totals by 1/4 (0.25) for each phenotype. The X2 values for the section and course results were 1.50 and 10.96, respectively. Discussion The X2 value for each cross was calculated to determine that the observed and expected ratios according to Mendelian inheritance were close in agreement (Garey et. al 2013). In order to determine if the observed deviations for each cross were within the limits expected by chance,10% and 25% of similar trials. The monohybrid autosomal ap/ap x +/+ cross results were the most similar in comparison of results and probability of all the crosses. The chi-square results were extremely similar as expected and both accept the hypothesis that deviations

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