Multiple choice

In F2 generation of a dihybrid cross,

  1. 4 phenotypes appear in the ratio 9 : 3 : 3 : 1, if the loci are linked

  2. 4 phenotypes appear in the ratio 9 : 3 : 3 : 1 if the loci are unlinked

  3. 2 phenotypes appear in the ratio 3 : 1 if the loci are unlinked

  4. 3 phenotypes appear in the ratio 1 : 2 : 1 if the loci are unlinked

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

4 phenotypes appear in the ratio 9 : 3 : 3 :1 if the loci are unlinked. It is correct as they have to assort independently.