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  4. The genotypic ratio of 9: 3: 3: 1 is due to

Q. The genotypic ratio of 9 : 3 : 3 : 1 is due to

 1841  233 COMEDKCOMEDK 2010Principles of Inheritance and Variation Report Error

Solution:

The genotypic ratio of a dihybrid cross is 9 : 3 : 3 : 1. The occurrence of four. types of individuals in F2 generation of dihybrid cross. shows that the factors of each of the two characters assort independent of the other as if the other pairs of factors are not present. This law of independent assortment is applicable to factors which are located on different chromosomes or are located distantly" on the same chromosome .