When a wheat variety with red kernels (homozygous for two non allelic and independent dominant genes) is crossed with white kenneled wheat (homozygous for two recessive non allelic independent genes), the phenotypic ratio in the F2 generation would be________________?

 

A. 9:3:3:1

B. 9:7

C. 9:9:9:3:3:3:1

D. 1:4:6:4:1