The phenotypic ratio obtained in quantitative | vedclass

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(B) In quantitative inheritance (polygenic inheritance),the phenotypic ratio follows the binomial expansion $(a + b)^n$,where $n$ is the number of gen

Vedclass · Accepted Answer

$1 : 4 : 6 : 4 : 1$

Vedclass · Answer

(B) In quantitative inheritance (polygenic inheritance),the phenotypic ratio follows the binomial expansion $(a + b)^n$,where $n$ is the number of gene pairs involved.For a dihybrid cross involving $2$ pairs of genes,the ratio is $(1 + 1)^4$ or specifically derived from the expansion of $(1 + 1)^2$ squared,resulting in $1 : 4 : 6 : 4 : 1$.If $3$ pairs of genes are involved,the ratio becomes $1 : 6 : 15 : 20 : 15 : 6 : 1$.

The phenotypic ratio obtained in quantitative inheritance of a dihybrid cross is

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