Genetics: Analysis and Principles 4th Edition by Robert Brooker

Exercise 13

In chickens, the Leghorn variety has white feathers due to an autosomal dominant allele. Silkies have white feathers due to a recessive allele in a second (different) gene. If a true-breeding white Leghorn is crossed to a true-breeding white Silkie, what is the expected phenotype of the F 1 generation If members of the F 1 generation are mated to each other, what is the expected phenotypic outcome of the F 2 generation Assume the chickens in the parental generation are homozygous for the white allele at one gene and homozygous for the brown allele at the other gene. In subsequent generations, nonwhite birds will be brown.