Question

In the $F_2$ generation of a Mendelian dihybrid cross the number of phenotypes and genotypes are

• A. Phenotypes-4; Genotypes-16
• B. Phenotypes-4; Genotypes-9
• C. Phenotypes-9; Genotypes-4
• D. Phenotypes-4; Genotypes-8

Answer 1

Answer: (B)

The correct option is D Phenotypes-4; Genotypes-9
The dihybrid cross is a cross between two different genes means a cross between two different characters.

In F2 generation - 4 phenotypes are present (yellow round, Green round, yellow wrinkled and green wrinkled)

And 9 genotypes are present (1:2:1:2:4:2:1:2:1)

So the correct answer is "Phenotypes-4, Genotypes-9".