Download Check Up 8 - Nashua School District

Check Up 8
Topic: Genetics
Check Up for Hs
1. Explain why Mendel’s cross of purebred tall and short pea plants resulted in only tall plants.
2. In pea plants, green pod color is controlled by a dominant allele. Yellow is controlled by a
recessive allele. Explain why a plant with yellow pods can never be a hybrid.
3. In peas, the allele for green pods (G) is dominant over the allele for yellow pods (g). The table
shows the phenotypes of offspring produced from a cross of two plants with green pods.
Phenotype
Number of offspring
Green pods
27
Yellow pods
9
a. Calculate what percent of the offspring produce green pods. Calculate what percent have
yellow pods.
b. What is the genotype of the offspring with yellow pods? What are the possible genotypes of
the offspring with green pods?
c. What are the genotypes of the parents? How do you know?
4. In pea plants, the allele for smooth pods (S) is dominant over the allele for pinched pods (s).
Construct a Punnett square that shows a cross between an SS plant and an Ss plant. Predict
what percent of the offspring are likely to have smooth pods.
5. A woman gives birth to a son. Two years later, she gives birth to another son. What is the
probability that her third child will be a girl? Explain your reasoning.
Check Up for Es
1. In which generation are the parents purebred? In which generation are they hybrids?
2. In the F2 generation, what percent of the offspring have purple flowers? What is the
genotype of the purple-flowered offspring?
3. Explain why Mendel’s cross of purebred tall and short pea plants resulted in only tall
plants.
4. In pea plants, the allele for smooth pods (S) is dominant over the allele for pinched pods
(s). Construct a Punnett square that shows a cross between an SS plant and an Ss plant.
Predict what percent of the offspring are likely to have smooth pods.
5. A woman gives birth to a son. Two years later, she gives birth to another son. What is
the probability that her third child will be a girl? Explain your reasoning.
Check Up for Fs
Dominant gene
Genetics
Mendel
Probability
Trait
_____________________
1. Father of Genetics
_____________________
2. the study of inheritance
_____________________
3. characteristic
_____________________
4. stronger form of a gene
_____________________
5. likelihood that an event will occur
Name:
Period:
Date:
Check Up for Hs
1. Explain why Mendel’s cross of purebred tall and short pea plants resulted in only tall plants.
2. In pea plants, green pod color is controlled by a dominant allele. Yellow is controlled by a
recessive allele. Explain why a plant with yellow pods can never be a hybrid.
3. In peas, the allele for green pods (G) is dominant over the allele for yellow pods (g). The table
shows the phenotypes of offspring produced from a cross of two plants with green pods.
Phenotype
Number of offspring
Green pods
27
Yellow pods
9
a. Calculate what percent of the offspring produce green pods. Calculate what percent have
yellow pods.
b. What is the genotype of the offspring with yellow pods? What are the possible genotypes of
the offspring with green pods?
c. What are the genotypes of the parents? How do you know?
3. In pea plants, the allele for smooth pods (S) is dominant over the allele for pinched pods (s).
Construct a Punnett square that shows a cross between an SS plant and an Ss plant. Predict
what percent of the offspring are likely to have smooth pods.
5. A woman gives birth to a son. Two years later, she gives birth to another son. What is the
probability that her third child will be a girl? Explain your reasoning.
Name:
Period:
Date:
Check Up 8 for Es
1. In which generation are the parents purebred? In which generation are they hybrids?
2. In the F2 generation, what percent of the offspring have purple flowers? What is the
genotype of the purple-flowered offspring?
3. Explain why Mendel’s cross of purebred tall and short pea plants resulted in only tall
plants.
4. In pea plants, the allele for smooth pods (S) is dominant over the allele for pinched pods
(s). Construct a Punnett square that shows a cross between an SS plant and an Ss plant.
Predict what percent of the offspring are likely to have smooth pods.
5. A woman gives birth to a son. Two years later, she gives birth to another son. What is
the probability that her third child will be a girl? Explain your reasoning.
Name:
Period:
Date:
Check Up 8 for Fs
Dominant gene
Probability
Genetics
Mendel
Trait
_____________________
1. Father of Genetics
_____________________
2. the study of inheritance
_____________________
3. characteristic
_____________________
4. stronger form of a gene
_____________________
5. likelihood that an event will occur
Name:
Period:
Date:
Check Up 8 for Fs
Dominant gene
Probability
Genetics
Mendel
Trait
_____________________
1. Father of Genetics
_____________________
2. the study of inheritance
_____________________
3. characteristic
_____________________
4. stronger form of a gene
_____________________
5. likelihood that an event will occur