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 ).
(a) Give the F ₁ and F ₂ phenotypic results of a cross of a pure-breeding rose comb ( RR pp ) with a pure-breeding pea comb ( rr PP ).
(b) Give the phenotypic results of a cross of Rr Pp x rr Pp .
(c) Give the phenotypic results of a cross of RR Pp x rr Pp .
(d) Give the phenotypic results of a cross of Rr pp x rr Pp .
(e) Give the phenotypic results of a cross of Rr Pp x rr pp .

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The Answer of 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 ). (a) Give the F ₁ and F ₂ phenotypic results of a cross of a pure-breeding rose comb ( RR pp ) with a pure-breeding pea comb ( rr PP ). (b) Give the phenotypic results of a cross of Rr Pp x rr Pp . (c) Give the phenotypic results of a cross of RR Pp x rr Pp . (d) Give the phenotypic results of a cross of Rr pp x rr Pp . (e) Give the phenotypic results of a cross of Rr Pp x rr pp .

In Poultry, the Genes for Rose Comb ( R )