Question
What is the phenotypic ratio of a dihybrid cross?
- 3 : 1
- 9 : 3 : 3 : 1
- 2 : 1 : 1 : 1
- 3 : 2 : 1.
Answer
9 : 3 : 3 : 1
Explanation:
The phenotypic ratio of a dihybrid cross is 9:3:3:1, which means that for every 16 offspring, 9 will show both dominant traits, 3 will show one dominant and one recessive trait, 3 will show the other dominant and recessive trait, and 1 will show both recessive traits. This ratio is based on the principle of independent assortment, which states that the inheritance of one trait does not influence the inheritance of another trait.
