In Poultry,the Genes for Rose Comb (R)and Pea Comb (P)produce

Multiple Choice

In poultry,the genes for rose comb (R) and pea comb (P) produce walnut whenever they occur together (R__ P__) ; single-combed individuals have the homozygous condition for both genes (rr pp) .Give the phenotypic results of a cross of Rr Pp x rr Pp  

A) 9/16 walnut, 3/16 rose, 3-16 pea, 1/16 single
B) 3/8 walnut, 3/8 pea, 1/8 rose, 1/8 single
C) 3/4 walnut, 1/4 rose
D) 1/4 walnut, 1/4 rose, 1/4 pea, 1/4 single.
E) 1/4 walnut, 1/4 rose, 1/4 pea, 1/4 single..