The Living World 6th Edition by George Johnson, Jonathan Losos,William Ober,Claire Garrison

Exercise 15

Silky feathers in chickens is a single-gene recessive trait whose effect is to produce shiny plumage.
a. If 108 birds were raised from a cross between individuals heterozygous for this gene, how many would be expected to be silky and how many normal
b. If you had a normal-feathered bird, what would be the easiest cross to perform in order to determine if the bird is homozygous or heterozygous for the silky allele