Solution:
- Law of independent assortment is based on dihybrid cross.
- It states that inheritance of one character is always independent of the inheritance of other characters within the same individual.
Example:
- A cross is made between homozygous yellow round seeds(YYRR) to another homozygous green wrinkled seeds(yyrr).
- In the F1 generation, all plants are heterozygous yellow round(YyrRr).
- When these plants is to self pollination in the F2 generation,9 plants are Yellow round, 3 plants are yellow wrinkled, 3 plants are green round and 1 plant is green wrinkled are formed.
- The dihybrid phenotypic ratio is 9:3:3:1.