In the flowering plants (the angiosperms),the process of double fertilization occurs.This is where one sperm nucleus from the pollen grain fertilizes the egg,and the other fuses with the two polar nuclei in the female gametophyte to produce the triploid (3n)endosperm tissue.The aleurone layer (the outer layer of cells of the endosperm)can be colored or colorless.The allele C causes color (purple),and the allele c gives colorless aleurone.A plant is of genotype Cc and self-pollinates.What ratio of colored to colorless aleurone layered endosperms are expected in the progeny?