1. Tardigrade
  2. Question
  3. Biology
  4. A polygenic trait is controlled by 3 genes A, B and C. In a cross AaBbCc × AaBbCc, the phenotypic ratio of the offsprings was observed as: 1: 6: ×: 20: ×: 6: 1 what is the possible value of x ?

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Q. A polygenic trait is controlled by $3$ genes $A, B$ and $C$. In a cross $AaBbCc × AaBbCc$, the phenotypic ratio of the offsprings was observed as : $1 : 6 : × : 20 : × : 6 : 1$ what is the possible value of $x$ ?

Principles of Inheritance and Variation

Solution:

Correct answer is (c) 15