Multiple choice

What is the ratio of F2 generation in a dihybrid cross?

  1. 1 : 3 : 1

  2. 1 : 4

  3. 9 : 3 : 3 : 1

  4. 9 : 3 : 3

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The classic dihybrid phenotypic ratio is 9:3:3:1, where 9 show both dominant traits, 3 show one dominant trait, 3 show the other dominant trait, and 1 shows both recessive traits. This ratio appears when two heterozygous parent plants (TtRr x TtRr) cross.