- Home
- Standard 12
- Biology
4.Principles of Inheritance and Variation
normal
The phenotypic ratio obtained in quantitative inheritance of a dihybrid cross is
A
$1 : 2 : 1$
B
$1 : 4 : 6 : 4 : 1$
C
$1 : 6 : 15\ 20 : 15 : 6 : 1$
D
$9 : 3 : 3 : 1$
Solution
(b)Ratio $1 : 4 : 6 : 4 : 1$ it is due to two pairs of genes. But if it is due to $3$ pairs of genes, the size ratio shall be $1 : 6 : 15 : 20 : 15 : 6 : 1.$
Standard 12
Biology