A cross was made between two strains of plants that are agriculturally important. One strain was disease-resistant but herbicide-sensitive; the other strain was disease-sensitive but herbicide-resistant. A plant breeder crossed the two plants and then allowed the F: generation to self-fertilize. The following data were obtained:
F1, generation: All offspring are disease-sensitive and herbicide-resistant
F2 generation: 157 disease-sensitive, herbicide-resistant
57 disease-sensitive, herbicide-sensitive
54 disease-resistant, herbicide-resistant
20 disease-resistant, herbicide-sensitive
Total: 288
Formulate a hypothesis that you think is consistent with the observed data. Test the goodness of Fit between the data and you hypothesis using a chi square test. Explain what the chi square results mean.