If a dihybrid is test crossed, the phenotype ratio of progeny will be

A. 9 : 3 : 3 : 1

B. 9 : 3 : 4

C. 1 : 1 : 1 : 1

D. 12 : 3 : 1

Answer: Option C

Solution(By Examveda Team)

If a dihybrid is a test crossed, the phenotype ratio of progeny will be 1: 1 : 1 : 1.
Dihybrid test crossing is an experimental cross in which we took one parent from the F1 generation with a heterozygous condition of two traits and another parent in double homozygous condition which will produce different types of gametes which will further fertilise to form new individuals.