g feathers, or no leg feathers. Feather legged chickens only ever have feather-legged offspring. Most of the time, chickens with fluffy leg feathers have offspring with fluffy leg feathers, but sometimes they will also have offspring with skinny leg feathers or no leg feathers. One cause of feathered legs in chickens is a deletion in a regulatory region for a gene that is linked to developing leg scales. A cell can differentiate into either feathers or scales, but not both. We will represent the alleles for the gene linked to feather type with F and f. We will represent the alleles for the regulatory region of the gene linked to making leg scales with R and r. A chicken with non-feathered legs was crossed with a chicken with skinny leg feathers. Their offspring have the following phenotypic ratios: 50% non-feathered legs, 50% skinny leg feathers. Based on this, the likely genotypes of the parents are: