Question

A trait is controlled by quantitative inheritance. If
15 phenotypes are possible then what would be number of polygenes involved ?

(1) 12
(2) 6
(3) 10
(4) 14

Correct Answer is 4th option but plz tell me how?
Proper explanation will be marked as BRAINLIEST​

Answer 1

number of phenotype for polygenes = 2n+1 it is an equation to find this

where n = pair of polygenes

by applying this  2n+1=15  n=7 pairs polygene =14 polygenes

in the same way no of genotype for polygenes =3ⁿ