Predictions/Explanations
Hypothesis: We hypothesis that all of the F1 generation will be all wild type and F2 will have the phenotype ratio 9:3:3:1. Nine out of sixteen will be all wild type, three out of sixteen will have wild type eye but apterous wings, three out of sixteen will have sepia eyes and wild type wings, and one out of sixteen will have sepia eyes and apterous wings.
Null Hypothesis: There is no significant differences between the observed and expected frequencies.
Below are two dihybrid punnet squares that show the expected phenotypes of the fruit flies. The top table is the the expected first generation of fruit flies which was the result of crossing wild type eyed and apterous winged males with wild type wings and sepia eyed females. All of the offspring will be heterzygous according to the dihybrid punnet square. The bottom table shows the second generation of flies that are expected from crossing some fo the heterozygous flies from the first generation. The phenotype ratio of the offspring is expected to be 9:3:3:1.
Null Hypothesis: There is no significant differences between the observed and expected frequencies.
Below are two dihybrid punnet squares that show the expected phenotypes of the fruit flies. The top table is the the expected first generation of fruit flies which was the result of crossing wild type eyed and apterous winged males with wild type wings and sepia eyed females. All of the offspring will be heterzygous according to the dihybrid punnet square. The bottom table shows the second generation of flies that are expected from crossing some fo the heterozygous flies from the first generation. The phenotype ratio of the offspring is expected to be 9:3:3:1.