Question

calculate the sum total of phenotypes and genotypes in F2 generation if a character is controlled by 3 pairs of polygenes?
1. 7
2. 27
3. 34
4. 35​

Answer 1

Given:

Inheritance is controlled by 3 pairs of polygenes.

To find:

Sum total of phenotypes and genotypes in the F2 generation.

Calculation:

General formula for phenotypes and genotypes in F2 generation in polygenic inheritance is:

$\sf{phenotypes = {2}^{n} + 1} \\ \sf{genotypes = {3}^{n} }$

Here n = 3 as the number of polygenes is 3 pair.

$\sf{phenotypes = {2}^{3} + 1} = 9 \\ \sf{genotypes = {3}^{3} = 27}$

So , addition of phenotypes and genotypes:

$\boxed{ \rm{sum = 27 + 9 = 36}}$

Answer 2

Explanation:

phenotype = 2n+1

2(3)+1=7

genotype= n^2

=3^2=9

so the sum total is 9+7=16

Hope it was helpful