Multiple choice

In the 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
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B Correct answer
Explanation

In the F2 generation of a dihybrid cross, 4 phenotypes appear in the ratio 9 : 3 : 3 :1, if the loci are unlinked.

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