In corn, a triple heterozygote was obtained carrying the mutant alleles (shrunken), w (white aleurone), and y (waxy endosperm), all paired with their normal wild-type alleles. this triple heterozygote was testcrossed, and the progeny contained 116 shrunken, white; 4 fully wild type; 2538 shrunken; 601 shrunken, waxy; 626 white; 2708 white, waxy; 2 shrunken, white, waxy; and 113 waxy.

a. determine if any of these three loci are linked, and, if so, show map distances.

b. show the allele arrangement on the chromosomes of the triple heterozygote used in the testcross.