Question

A homozygous tall plant (T) bearing red coloured (R) flowers is crossed with a homozygous dwarf plant (t) bearing white flowers (r).

Give the genotype and phenotype of the F₁ Generation.

Answer 1

1. The genotype of the homozygous dominant plant is TTRR.
2. So, the gamete produced by the dominant plant will be TR.
3. The genotype of the homozygous recessive plant is ttrr.
4. So, the gamete produced by the recessive plant will be tr.
5. The cross between the two plants can be shown using Punnett square.

♂ ♀	TR	TR
tr	TtRr	TtRr
tr	TtRr	TtRr

Thus, the genotype of the F₁ generation is TtRr and the phenotype of the F₁ generation is tall plants with red-colored flowers.