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Biology · PYQ NEET UG 2025

हिन्दी

Genes R and Y follow independent assortment. If RRYY produce round yellow seeds and rryy produce wrinkled green seeds, what will be the phenotypic ratio of the F2 generation?

  1. Phenotypic ratio - 1 : 2 : 1
  2. Phenotypic ratio - 3 : 1
  3. Phenotypic ratio - 9 : 3 : 3 : 1
  4. Phenotypic ratio - 9 : 7

Correct answer · Option 3

Phenotypic ratio - 9 : 3 : 3 : 1

Explanation

For a dihybrid cross exhibiting independent assortment, the standard phenotypic ratio in the F2 generation is 9 : 3 : 3 : 1.
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