Pigment of chicken feathers is regulated by two genes, the gene for feather pigment C, and a gene that inhibits pigment production, I. A mother chicken, who is homozygous dominant for gene C, and heterozygous for gene I, is crossed with a father chicken, who is heterozygous for the pigment gene, and heterozygous for gene I.
Inhibition is dominant to uninhibited, pigmented feathers are dominant to unpigmented feathers.
What is the probability of one of the offspring of these two chickens having white feathers? (percentage)