1) A green pea plant (Gg) is crossed with a yellow pea plant (gg).
Punnett Square:
g g
G Gg Gg
g gg gg
GenoType= 0 GG: 2 Gg : 2 gg
Phenotype= 2 Green pea plants: 2 yellow pea plants
2) A tall plant (TT) is crossed with a tall plant (Tt).
Punnett Square:
T t
T TT Tt
T TT Tt
GenoType= 2 TT: 2 Tt : 0 tt
Phenotype= 4 Tall plants: 0 short plants
3) A tall plant (Tt) is crossed with a short plant (tt).
Punnett Square:
t t
T Tt Tt
t tt tt
GenoType= 0 TT: 2 Tt : 2 tt
Phenotype= 2 Tall plants: 2 short plants
4) A red flower (Rr) is crossed with a white flower (rr).
Punnett Square:
r r
R Rr Rr
r rr rr
GenoType= 0 RR: 2 Rr : 2 rr
Phenotype= 2 Red flowers: 2 white flowers
5) A white flower (rr) is crossed with a white flower (rr).
Punnett Square:
r r
r rr rr
r rr rr
GenoType= 0 RR: 0 Rr : 4 rr
Phenotype= 0 Red flowers: 4 white flowers
6) A black chicken (BB) is crossed with a black chicken (BB).
Punnett Square:
B B
B BB BB
B BB BB
GenoType= 4 BB: 0 Bb : 0 bb
Phenotype= 4 Black chickens: 0 other color
Parent Tip: Review the logic above to help your child master the concept of punnett square worksheet answers.
