Download Chapter 11 Resource: Heredity

Name
1
Date
Reinforcement
Class
Genetics
One of the traits of pea plants the Mendel observed was seed shape. The seeds were either round
or wrinkled. Mendel observed that round seed shape (R) dominated over the wrinkled shape (r).
Directions: Complete the Punnett square to show the possible offspring of two heterozygous pea plants. Then
answer the questions that follow.
R
r
Meeting Individual Needs
R
r
1. What two forms of the trait for seed shape did Mendel observe?
2. What was the phenotype for seed shape of both parent plants?
3. What percentage of the possible types of offspring had the same genotype as the parents?
Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
4. What percentage of the possible types of offspring were homozygous?
5. What percentage of the possible types of offspring had the same phenotype as the parents?
6. What was the genotype of the offspring that did not share the parents' phenotype?
7. What is the probability that two heterozygous parents would have an offspring that produced
round seeds? (Express your answer as a ratio.)
Directions: Answer the following questions on the lines provided.
8. What is genetics?
9. What role do genes play?
10. What 3 principles of heredity did Mendel discover?
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Name
Date
2
Reinforcement
Class
Genetics Since Mendel
Directions: Answer the following questions on the lines provided.
1. There are four phenotypes of human blood.
a. Is it possible for two alleles to produce four phenotypes?
b. What phenotype is produced by each of the following genotypes?
AO ______
OO ______
BB ______
BO ______
AB ______
c. How many alleles are there for blood type?
d. When a trait has more than two alleles, how is that trait inherited?
e. Which blood type is inherited by incomplete dominance? Explain your answer.
A
2. This pedigree shows the inheritance pattern of a sex-linked disorder, such as color blindness.
Is the father, A, affected or not affected by the disorder? Explain your answer.
3. Name a sex-linked genetic disorder.
4. Name a homozygous recessive genetic disorder.
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Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
Meeting Individual Needs
AA ______
Name
3
Date
Reinforcement
Class
Advances in Genetics
Directions: For each of the following, write the letter of the term or phrase that best completes the sentence.
1. ______ uses biological and chemical methods to change the DNA sequence of genes.
a. Recombinant DNA
c. Gene therapy
b. Genetic engineering
d. Selective breeding
Meeting Individual Needs
2. Genetic engineering can be accomplished in bacteria through ______.
a. recombinant DNA
c. gene therapy
b. genetic engineering
d. selective breeding
3. Gene therapy has shown promise in controlling ______.
a. high blood pressure
c. cystic fibrosis
b. the common cold
d. multiple sclerosis
4. Many stores ______ genetically engineered produce.
a. provide pamphlets on
c. label
b. refuse to sell
d. carry only
5. ______ involves placing a normal allele in a cell that has a mutation and hoping that
the normal allele begins to function.
a. Chemical engineering
c. Recombinant DNA
b. Selective breeding
d. Gene therapy
Directions: Answer the following questions on the lines provided.
Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.
6. Explain how genetic engineering produces tomatoes that are ripe when they reach consumers?
7. How did knowledge of genotypes affect scientists’ efforts to improve plants used for food and
clothing?
8. Identify a disease or disorder and explain how it might be controlled by genetic engineering.
9. Why do some people prefer to eat foods that are not genetically engineered?
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