In a unique species of plants, flowers may be either yellow,blue, red, or mauve. A pure-breeding line with blue flowers iscrossed to a pure-breeding red-flowered line, and the resultingF1 plants have yellow flowers. In the F2 thefollowing ratio is observed:
9/16 yellow: 3/16 blue: 3/16 red: 1/16mauve
If pure-breeding yellow and mauve plants are crossed, the sameF2 ratio is observed.
A. Give a concise genetic hypothesis for the inheritance of thistrait (include number of genes, number of alleles and dominancerelations between alleles).
B. Designate your own gene symbols and list the genotypes andratios for each F2 class.
C. Determine the expected phenotypic ratios if the F1from above is crossed to a pure-breeding mauve plant.
