Multiple choice

The phenotypic ratio of the F2 generation of a monohybrid cross is

  1. 1 : 2

  2. 3 : 1

  3. 1 : 1

  4. 1 : 3
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In a monohybrid cross, the F2 generation always shows a 3:1 phenotypic ratio - 3 dominant phenotype and 1 recessive phenotype. This is Mendel's First Law from experiments with single-trait crosses. Options A and C represent genotypic ratios, not phenotypic.

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