Passage I

Table 1 lists 4 genes found in Pisum sativum (a garden pea), the possible alleles of each gene, and the possible genotypes for each gene.

Table 2 lists various garden pea genotypes and the phenotype associated with each genotype. Each gene affects only 1 of the 4 phenotypic traits listed.

Table 3 lists 4 garden pea crosses, the genotypes of the parents, and the percent of offspring that displayed each phenotype for the 4 traits listed in Table 2. In each cross, each parent donated 1 allele to each offspring at each gene.