Download Introduction to Punnett Squares: Practice

Introduction to Punnett Squares: Practice
Trait
Pod shape
Pod Color
Flower Position
Plant Height
Dominant Allele
Smooth (N)
Green (G)
Axial (A)
Tall (T)
1. Nn X NN
Recessive Allele
Constricted (n)
Yellow (g)
Terminal (a)
Short (t)
Genotype:
Phenotype:
2. Aa X aa
Genotype:
Phenotype:
3. Tt X Tt
Genotype:
Phenotype:
4. Cross two plants that are heterozygous for green pods
Genotype:
Phenotype:
5. Cross a plant that is heterozyogous for axial flowers with a plant that has terminal
flowers.
Genotype:
Phenotype:
6. Cross a homozyogous tall plant with a short plant
Genotype:
Phenotype:
7. Cross a plant that is heterozygous for smooth pods with a plant that has constricted
pods,
Genotype:
Phenotype:
8. When a tall plant is crossed with a short plant, some of the offspring are short. What
are the genotypes of the parents and the offspring? What is the phenotypic ration in the
offspring
Parent genotypes:
Offspring genotypes:
Phenotypic ratio:
9. Three fourths (3/4) of the plants produced by a cross between two unknown pea
plants have axial flowers and the other ¼ have terminal flowers. What are the genotypes
of the parent plants?
Parent Genotypes
10 What cross would result in ½ of the offspring having green pods and ½ of the offspring
having yellow pods?
Cross:
11. List the cross or crosses that you could use in order to guarantee that the offspring
would have axial flowers:
12. List the cross or crosses that you could use in order to guarantee that at least some of
the offspring would have terminal flowers.
13. Cross a plant that is homozygous dominant for pod color with a plant that is
homozygous recessive for pod color.
Genotype:
Phenotype:
14. Take the offspring from the cross in #13. Self pollinate those offspring. Predict
what the next generation will look like
Genotype:
Phenotype: