The gene c2 in chickens is responsible for a condition known as creeper (chickens walk poorly due to shortened deformed legs). The allele of this gene that is responsible for normal development is c1. Individuals that are homozygous for c1 develop normally, but heterozygous individuals (c1c2) have creeper. Chick embryos that are homozygous for creeper (c2c2) die during incubation and never hatch. If two chickens showing the creeper phenotype are crossed, what phenotypic ratio is expected for the progeny that hatch?.