Question

A homozygous Tall plant (T) bearing red coloured (R) flowers is crossed with a homozygous dwarf plant (t) bearing white flowers (r):
(1) Give the Genotype and Phenotype of the F₂ generation.
(2) Give the possible combinations of the gametes that can be obtained from the F₂ hybrid.
(3) Give the dihybrid ratio and the phenotype of the offsprings of the F₂ generation when two plants of the F₁ generation above are crossed.

Answer 1

(1) Genotype — TtRr. Phenotype — All tall with red flowers.
(2) Gametes — TR, Tr, tR, tr.
(3) 9:3:3:1, 9 — Tall with red flowers, 3 — Tall with white flowers, 3 — Dwarf with red flowers, 1 — Dwarf with white flowers.