A polygenic trait is controlled by 3 genes A, B and C. In a cross AaBbCc x AaBbCc, the phenotypic ratio of the offsprings was observed as 1 : 6 : m : 20 : m : 6 : 1. What is the value of m?
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When more than one gene is controlling phenotypic expression of one character such condition is called polygenic inheritance.
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Answer:
In this case we have the phenomenon of the poly-genetic inheritance in which the phenotypic expression is being controlled by more than one genes (A,B and C in this case).
Explanation:
As we have 3 genes here we will have 4³ and the number of zygote will be 64.
1+ 6+ 15+ 20+ 15+ 6+ 1= 64
therefore the value of m will be 15 in this case
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