Download Punnett Square Activities

Punnett Square Activities
1. Cross a purebred short pea plant with a hybrid tall pea plant. (tt x Tt) What will
the phenotype and genotype of the offspring be?
t
t
Genotype
T
Phenotype
t
2. Cross a purebred tall pea plant with a hybrid tall pea plant. (TT x Tt) What will
the phenotype and genotype of the offspring be? What % will carry the recessive
gene for short?_______________
T
T
Genotype
T
Phenotype
t
3. Cross a hybrid tall with another hybrid tall. (Tt xTt) What will the phenotype
and genotype of the offspring be?
T
t
Genotype
T
Phenotype
t
4. Cross a purebred Black with a Hybrid Black. (BB x Bb) What will the
phenotype and genotype of the offspring be?
B
B
b
B
Genotype
Phenotype
What % will be pure black? __________
What % will be Hybrid black? __________
What % will be white? __________
5. Tall is dominant. Cross a pure tall with a pure short. What will the phenotype
and genotype of the offspring be?
Genotype
Phenotype
6. In pea plants, yellow peas are dominant over green peas. Cross a heterozygous
(hybrid) yellow (Yy) with a homozygous (purebred) for green (yy).
Genotypes:_____________________
Phenotypes:_____________________
7. Cross two pea plants that are heterozygous for yellow. Green is the other color.
Genotypes:_____________________
Phenotypes:_____________________
8. In pea plants round is dominant over wrinkled. Cross a plant homozygous for
round and another homozygous for wrinkled.
Genotypes:_____________________
Phenotypes:_____________________
9. In pea plants round is dominant over wrinkled. Cross a plant heterozygous for
round and another homozygous for wrinkled.
Genotypes:_____________________
Phenotypes:_____________________
10. In pea plants purple is dominant over white. Cross a heterozygous purple with a
hybrid purple.
Genotypes:_____________________
Phenotypes:_____________________