The Colour of Wheat Seeds Is Controlled by Two Genes

Multiple Choice

The colour of wheat seeds is controlled by two genes. The alleles (R₁ and r₁) of one gene assort independently to the alleles (R₂ and r₂) of the other gene. R₁ and R₂ produce a red pigment while r₁ and r₂ do not produce any pigment. The effect of the alleles is additive so that R₁/R₁; R₂/R₂ give dark red colour while r₁/r₁; r₂/r₂ produces white. A plant with R₁/r₁; R₂/r₂ has intermediate red colour. If the following cross was set up:
R₁/r₁; R₂/r₂ x R₁/R₁; R₂/R₂

A) none of the offspring would have the deep red colour similar to one of the parents.
B) some of the offspring would be white.
C) some of the offspring would have an intermediate red colour similar to one of the parents.
D) most of the offspring would have the deep red colour similar to one of the parents.
E) all of the offspring would have intermediate colour.