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How many gene pairs are involved in a cross involving polygenic inheritance in which only 2/125 off the offspring were as extreme as one of the p1 parents?how the ans is 3

By Suman Patra
How many gene pairs are involved in a cross involving polygenic inheritance in which only 2/125 off the offspring were as extreme as one of the p1 parents?how the ans is 3

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One comment

  1. When individual plants from the F2 are selected and mated, the phenotype of the resulting offspring also produces a range of phenotypes.
    There is a range of phenotypes, but most of the offspring are similar in color to the parents.
    The number of genes may be calculated if the proportion of F2 individuals expressing either of the two most extreme (i.e. parental) phenotypes can be determined according to the following formula:
    1/4^n = proportion of offspring either red or white.
    1/4^n =1/64 , solve for n, 4^3 = 64.
    Similarly in your case value is 125 which is again a cube of 5 so the again the value of n will be 3. Hence the number of gene pairs is 3