Question

The phenotypic ratio of the monohybrid cross for tall:dwarf in the F2 generation is

• A. 3:1
• B. 1:2:1
• C. 1:3
• D. 1:1

Answer 1

The correct option is A 3:1

A monohybrid cross is a breeding experiment in which two individuals of the same species that differ in a single trait are cross bred. The cross bred individuals are homozygous for the given trait.
In a cross between homozygous tall and dwarf plants, the F1 generation plants obtained are all heterozygous tall. When these plants are crossed with each other, the phenotypic ratio would be 3:1, with three-fourths of the plants being tall (TT and Tt) and one-fourth dwarf plants (tt).