Biology for IGCSE & O level - Inheritance (Section 8 - No. 3)

What is the expected phenotypic ratio of a monohybrid cross (Tt x Tt) where T is dominant?

1:1

3:1

1:2:1

9:3:3:1

The phenotypic ratio of a monohybrid cross is 3:1. 3 tall plants for every 1 short plant