Identify the phenotypic ratio of Duplicate gene action.

A. 9 : 7

B. 15 : 1

C. 13 : 3

D. 9 : 3 : 4

Answer: Option B

Solution(By Examveda Team)

The phenotypic ratio of Duplicate gene action is 15 : 1.
In this cross, whenever a dominant allele is present at either locus, the biochemical conversion occurs, and a coloured kernel results.
Thus, only the double homozygous recessive genotype produces a phenotype with no colour, and the resulting phenotypic ratio of colour to noncolour is 15 : 1.