Test cross ratio in case of duplicate gene action will be

Solution (By Examveda Team)

Test cross ratio in case of duplicate gene action will be 3 : 1.
The test cross is another fundamental tool devised by Gregor Mendel. A test cross is an experimental cross of an individual organism with a dominant phenotype but an unknown genotype and an organism with a homozygous recessive genotype.
The phenomenon when either of the genes can provide the wild-type phenotype, this interaction is called duplicate gene action. Thus, the test cross in case of duplicate gene action will give a ratio of 3 : 1.