Three dominant traits of corn seedlings, tunicate seed (T-), glossy appearance (G-), and liguled stem (L-), are studied along with their recessive counterparts, nontunicate (tt), nonglossy (gg), and liguleless (ll). A trihybrid plant with the three dominant traits is crossed to a nontunicate, nonglossy, liguleless plant. Kernels on ears of progeny plants are scored for the traits, with the following results: Phenotype Number Tunicate, glossy, liguled 102 Tunicate, glossy, liguleless 106 Tunicate, nonglossy, liguled     18 Tunicate, nonglossy, liguleless   20 Nontunicate, glossy, liguled     22 Nontunicate, glossy, liguleless   23 Nontunicate, nonglossy, liguled   99 Nontunicate, nonglossy, liguleless 110 500 If evidence of linkage is present, calculate the recombination frequency or frequencies from the data presented.