Let's consider two alternative hypotheses concerning the parental genotypes. Hypothesis 1: Both parent corn plants were heterozygous for color. Write out the cross described. Prediction: If Hi (hypothesis 1) is true, then the expected genotypic ratios should be PP : Pp pp , and we should see a phenotypic ratio of If the hypothesis is wrong, then our observed ratio should differ significantly from the expected. Hypothesis 2: One parent was heterozygous and the other was homozygous recessive for kernel color. Write out the cross described. Prediction: If H2 (hypothesis 2) is correct, then the expected genotypic ratios should be PP _: Pp PP , and we should see a phenotypic ratio of If the hypothesis is wrong, then our observed ratio should differ significantly from the expected. Which hypothesis do you want to test? Heterozygous/homozygous Work in pairs. Count the number of kernels in 10 adjacent rows and record your results. If a kernel is even slightly dark, score it as dark. dark light total phenotypic ratio