Book Work Chapter 11 2 11 3 Parrot 2
Chapter 11.2 & 11.3
Introduction to Genetics
Step 1
Read sections 11.2 & 11.3 and complete the guided notes below.
1. What is probability?
2. In a parent pea plant with the allele pair Gg, what is the probability that one gamete will contain the G allele?
3. Complete the graphic organizer to define the characteristics of homozygous and heterozygous genotypes and phenotypes. Homozygous
Genotype
Phenotype
Heterozygous
4. The dominant allele for smooth pod shape in peas is S. The recessive allele for constricted pod shape is s. In the Punnett square, show the result of crossing two heterozygous parents (Ss). Write the genotype and the phenotype of each type of offspring in the space provided.
S
S
s
s
Genotype:
Genotype:
Phenotype:
Phenotype:
Genotype:
Genotype:
Phenotype:
Phenotype:
For Questions 5–9, refer to the Punnett square above
5. What is the probability of a heterozygous offspring?
Explain your answer.
6. What is the probability of a homozygous offspring?
Explain.
7. What is the probability of a homozygous recessive offspring?
8. What is the probability of a smooth phenotype?
Explain.
Explain
9. What is the probability of a homozygous recessive individual (ss) producing a gamete with a dominant allele
(S)?
Explain.
10. State the principle of independent assortment.
11. Using the principle of independent assortment, complete the Punnett square to show the results of an F1 cross between two individuals heterozygous for both pod color (C = green and c = yellow) and pod shape (S = smooth and s + constricted). The gametes and some of the genotypes of the F2 offspring are given.
CS
cS
Cs
cs
CS
CCSS
cS ccSs Cs
CCss
cs ccSs For Questions 12–15, refer to the Punnett square above.
12. Which genotype belongs to an offspring that is homozygous recessive for both traits? the probability of that genotype?
What is
13. What is the phenotype of an individual heterozygous for both traits?
14. What is the probability of an F2 offspring
Introduction to Genetics
Step 1
Read sections 11.2 & 11.3 and complete the guided notes below.
1. What is probability?
2. In a parent pea plant with the allele pair Gg, what is the probability that one gamete will contain the G allele?
3. Complete the graphic organizer to define the characteristics of homozygous and heterozygous genotypes and phenotypes. Homozygous
Genotype
Phenotype
Heterozygous
4. The dominant allele for smooth pod shape in peas is S. The recessive allele for constricted pod shape is s. In the Punnett square, show the result of crossing two heterozygous parents (Ss). Write the genotype and the phenotype of each type of offspring in the space provided.
S
S
s
s
Genotype:
Genotype:
Phenotype:
Phenotype:
Genotype:
Genotype:
Phenotype:
Phenotype:
For Questions 5–9, refer to the Punnett square above
5. What is the probability of a heterozygous offspring?
Explain your answer.
6. What is the probability of a homozygous offspring?
Explain.
7. What is the probability of a homozygous recessive offspring?
8. What is the probability of a smooth phenotype?
Explain.
Explain
9. What is the probability of a homozygous recessive individual (ss) producing a gamete with a dominant allele
(S)?
Explain.
10. State the principle of independent assortment.
11. Using the principle of independent assortment, complete the Punnett square to show the results of an F1 cross between two individuals heterozygous for both pod color (C = green and c = yellow) and pod shape (S = smooth and s + constricted). The gametes and some of the genotypes of the F2 offspring are given.
CS
cS
Cs
cs
CS
CCSS
cS ccSs Cs
CCss
cs ccSs For Questions 12–15, refer to the Punnett square above.
12. Which genotype belongs to an offspring that is homozygous recessive for both traits? the probability of that genotype?
What is
13. What is the phenotype of an individual heterozygous for both traits?
14. What is the probability of an F2 offspring