WBCS.LIVE practice question

Phenotypic ratio of Mendelian Dihybrid cross is

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 9 : 3 : 3 : 1
  2. 1 : 1 : 1 : 1
  3. 3 : 4 : 3 : 1
  4. 1 : 2 : 1 : 1

Correct answer and explanation

Correct answer: 9 : 3 : 3 : 1

Explanation: āœ… Correct Answer: A) 9 : 3 : 3 : 1 šŸ“š Explanation: In a Mendelian Dihybrid cross (tracking two traits), the phenotypic ratio observed in the second (F2) generation is 9 : 3 : 3 : 1. This means 9 offspring show both dominant traits, 3 show the first dominant and second recessive, 3 show the first recessive and second dominant, and 1 shows both recessive traits. This ratio proves the Law of Independent Assortment.