In corn, two independent genes are involved in kernel color. When both dominant alleles are present (C/C, R/R) the color is brown; when either is recessive the color is yellow, if both are recessive (c/c, r/r) the kernels are white. a brown corn plant from a pure line, known to have unstable color, is crossed with a c/c;r/r tester with stable color. describe the potential kernel colors in each of the following case. 

a. Ds on a different chromosome from both C and R, no Ac 

b. Ds and Ac on C chromosome 

c. Ds on R chromosome, Ac on another 

d. Ds in R gene, Ac in C 

e. Ac on C chromosome no Ds 

f. Ac in C gene, no Ds