Question

If T (tallness), Y (yellow colour) are dominant, when a plant heterozygous for both traits is selfed, then the ratio of pure homozygous dwarf and green wouJd be ____________.

Options

• `3/16`

• `1/3`

• `1/16`

• `1/4`

Answer 1

If T (tallness), Y (yellow colour) are dominant, when a plant heterozygous for both traits is selfed, then the ratio of pure homozygous dwarf and green wouJd be `1/16`.

Explanation:

When a plant heterozygous for tallness and yellow colour is selfed, an F₂ generation with 16 genotypes is produced. Only one of these will have a homozygous recessive genotype. As a result, the pure homozygous dwarf to green ratio is 1 : 16.