Question

Make a Punnett square for finding out the proportion of different genotypes in the progeny of a genetic cross between
(a) A pure tall (TT) pea plant with a pure dwarf (tt) pea plant.
(b) Red flower variety of pea (RR) with white flower variety of pea (rr).

Answer 1

(a)

Gamates	T	t
T	TT	Tt
t	Tt	tt

Genotype - 1(Homozygous tall): 2 (Heterozygous tall):1 (Homozygous dwarf)
Phenotype - 3 (Tall) :1(Dwarf)


(b)

Gamates	R	r
R	RR	Rr
r	Rr	rr

Genotype - 1(Homozygous red): 2 (Heterozygous red):1 (Homozygous white)
Phenotype - 3 (Red) :1(White)