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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.
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Solution
(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.
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