Question

A student analyzed ears of corn that demonstrated two traits in the F2 kernels, purple or white colors and smooth or wrinkled shapes. A tabulation of 135 individual kernels gave the following results:

purple and smooth = 75
white and smooth = 28
purple and wrinkled = 24
white and wrinkled = 8

The (purple and wrinkled, purple and smooth, white and wrinkled, and white and smooth) alleles are dominant.