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

(iii) Give the dihybrid ratio and the phenotype of the offspring of the $F_{2}$ -generation when two plants of the $F_{1}$ -generation above are crossed.

Open in App

Solution

TtRr
TtRr TR Tr tR tr

TR TTRR
(tall plant, red flower) TTRr
(tall plant, red flower) TtRR
(tall plant, red flower) TtRr
(tall plant, red flower)

Tr TTRr
(tall plant, red flower) TTrr
(tall plant, white flower) TrRr
(tall plant, red flower) Ttrr
(tall plant, white flower)

tR TtRR
(tall plant, red flower) TtRr
(tall plant, red flower) ttRR
(dwarf plant, red flower) ttRr
(dwarf plant, red flower)

tr TtRr
(tall plant, red flower) Ttrr
(tall plant, white flower) ttRr
(dwarf plant, red flower) ttrr
(dwarf plant, red flower)

$F_{2}$ generation phenotypic ratio- 9 tall plant, red flower: 3 tall plant, white flower: 3 dwarf plant, red flower: 1 dwarf plant, white flower

Phenotypes obtained in $F_{2}$ -generation are:

Tall plants with red flowers – 9
Tall plants with white flowers – 3
Dwarf plants with red flowers – 3
dwarf plants with white flowers - 1

So, the dihybrid ratio of the $F_{2}$ -generation is 9:3:3:1.

Suggest Corrections

Similar questions

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.

F_{2}

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

Mention the phenotypes of the offspring obtained in F₂ generation.

Join BYJU'S Learning Program

Explore more

Join BYJU'S Learning Program