Question

Dihybrid test cross ratio is

• A. 9 : 9 : 3 : 1
• B. 1 : 1 : 1 : 1
• C. 3 : 1
• D. 1 : 1.

Answer 1

The correct option is B 1 : 1 : 1 : 1

The crossing of dihybrid F1 individual with a homozygous recessive parent is called Dihybrid test cross. Its phenotypic and genotypic ratio is 1:1:1:1.

So, the correct option is ‘1:1:1:1’.