two plants, one true breeding for white flowers and one true breeding for purple flowers are crossed and the resulting F1 generation is self-pollinated. The resulting genotypes and phenotypes are observed in 500 F2 offspring of the cross. 190 white flowers, 123 purple flowers, 187 pale purple flowers. Determine an appropriate model for this phenotype, use the chi-squared formula and table to determine if these results differ from the model to a statistically significant degree