In Andalusian chickens, the black plumage gene B and the white plumage gene b in the heterozygous state give

In Andalusian chickens, the black plumage gene B and the white plumage gene b in the heterozygous state give blue feathers. 1. Is it possible to breed a pure breed of blue chickens, in which black and white birds would not be found? 2. What offspring will the Andalusian blue hen give when crossed with a rooster: a) black; b) white; c) blue?

1. no
2.a) uniformly by phenotype, by genotype 1: 1
b) 1: 1 by phenotype. 1: 1 by genotype
c) 3: 1 by phenotype and 1: 2-1 by genotype