Q221
Identify the phenotypic ratio of Duplicate gene action.
A.
9 : 7
B.
15 : 1
AnswerC.
13 : 3
D.
9 : 3 : 4
Answer: Option B
Solution
Answer: Option B
Solution:
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.