When pure long plant having white flower is crossed with pure dwarf plant having red flower, the dwarf progeny in F $_{2}$ generation will be

1/16

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2/16

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4/16

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9/16

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Solution

The correct option is B 4/16
As we know that tallness (T) is dominant over dwarfism (t) and red colour (R) is dominant over white (r) flower colour.
Parent Generation, P $_{1}$ : TTRR x ttrr
F $_{1}$ generation : TtRr (tall plant, red flower)
P $_{2}$ generation : TtRr x TtRr

Gametes TtRr---->
TtRr TR Tr tR tr
TR TTRR
(tall plant, red flower)
TTRr
(tall plant, red flower)
TtR
R
(tall plant, red flower)
TtRr
(tall plant, red flower)
Tr TTRr
(tall plant, red flower)
TTrr
(tall plant, white flower)
TtRr
(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, white flower)
Thus, dwarf progeny in F $_{2}$ generation= 4/16; C is correct answer.

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Gametes TtRr----> TtRr	TR	Tr	tR	tr
TR	TTRR (tall plant, red flower)	TTRr (tall plant, red flower)	TtR R (tall plant, red flower)	TtRr (tall plant, red flower)
Tr	TTRr (tall plant, red flower)	TTrr (tall plant, white flower)	TtRr (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, white flower)

When pure long plant having white flower is crossed with pure dwarf plant having red flower, the dwarf progeny in F2 generation will be

When pure long plant having white flower is crossed with pure dwarf plant having red flower, the dwarf progeny in F $_{2}$ generation will be