In a polygenic cross Aa Bb Cc × Aa Bb Cc, the phenotypic ratio offspring is 1: 6: 'X': 20: X: 6: 1. What is the value of 'X'?

Question

In a polygenic cross Aa Bb Cc × Aa Bb Cc, the phenotypic ratio offspring is 1: 6: 'X': 20: X: 6: 1. What is the value of 'X'? (A) 7 (B) 9 (C) 15 (D) 25

Tardigrade Admin · Accepted Answer

In a polygenic trihybrid cross (AaBbCc × AaBbCc) the phenotypic ratio is 1: 6: 15: 20: 15: 6: 1.

Q. In a polygenic cross $A a B b C c \times A a B b C c$ , the phenotypic ratio offspring is $1 : 6 :^{'} X^{'} : 20 : X : 6 : 1$ . What is the value of $^{'} X^{'}$ ?

$7$

$9$

$15$

$25$

In a polygenic trihybrid cross $(A a B b C c \times A a B b C c)$ the phenotypic ratio is $1 : 6 : 15 : 20 : 15 : 6 : 1$ .

Q. In a polygenic cross AaBbCc×AaBbCc, the phenotypic ratio offspring is 1:6:′X′:20:X:6:1. What is the value of ′X′?

7

9

15

25

In a polygenic trihybrid cross (AaBbCc×AaBbCc) the phenotypic ratio is 1:6:15:20:15:6:1.

Q. In a polygenic cross $A a B b C c \times A a B b C c$ , the phenotypic ratio offspring is $1 : 6 :^{'} X^{'} : 20 : X : 6 : 1$ . What is the value of $^{'} X^{'}$ ?

$7$

$9$

$15$

$25$

In a polygenic trihybrid cross $(A a B b C c \times A a B b C c)$ the phenotypic ratio is $1 : 6 : 15 : 20 : 15 : 6 : 1$ .