In Poultry, Rose Comb Is Controlled by a Dominant Allele

Essay

In poultry, rose comb is controlled by a dominant allele, and its recessive allele controls single comb.
(a)
Give the genotype and phenotype produced from crossing a pure-breeding rose comb chicken with a pure-breeding single comb chicken.
(b)
Give the results of the backcross of the F₁ hybrid with both pure-breeding parents.