Question

When F₁ hybrids (Tt) were self-crossed to produce the F₂ generation, what was the genotypic ratio observed?

Options

• 3 TT : 1 Tt : 0 tt

• 1 TT : 2 Tt : 1 tt

• All Tt

• 1 TT : 1 Tt : 1 tt

Answer 1

The cross Tt × Tt produces a 1:2:1 genotypic ratio. The Punnett square shows one TT, two Tt, and one tt offspring. This ratio is a fundamental result of the segregation of alleles during gamete formation.