question_answer

Work out a cross between a homozygous tall pea plant with green pods and a dwarf pea plant with yellow pods.

(i) State the phenotype and genotype of \[{{F}_{1}}\], generation.

(ii) Predict the phenotypic ratio of \[{{F}_{2}}\], generation using a Punnett square.

Answer:

(i) Phenotype and genotype of \[{{F}_{1}}\]- generation can be obtained in the following way
Phenotype       Tall plants with green pods
Genotype         TtGg
(ii) \[{{F}_{2}}\]- generation
	TG	TG	Tg	TG
TG	TTGG (Tall green)	TTGg (Tall green)	TtGG (Tall green)	TtGg (Tall green)
Tg	TTGg (Tall green)	TTgg (Tall yellow)	TtGg (Tall green)	Ttgg (Tall yellow)
tG	TtGg (Tall green)	ttGG (Tall green)	ttGg (Dwarf green)	ttGg (Dwarf green)
tg	TtGg (Tall green)	Ttgg (Tall yellow)	ttGg (Dwarf green)	Ttgg (Dwarf yellow)
The phenotypic ratio of \[{{F}_{2}}-\]generation is 9 : 3 : 3 : 1
Tall plants with green pods = 9
Tall plants with yellow pods = 3
Dwarf plants with green pods = 3
Dwarf plant with yellow pod = 1