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SECTION
6.3
MENDEL AND HEREDITY
Study Guide
KEY CONCEPT
Mendel’s research showed that traits
are inherited as discrete units.
VOCABULARY
trait purebred
genetics cross
law of segregation
MAIN IDEA: Mendel laid the groundwork for genetics.
1. What is genetics?
2. Whose early work is the basis for much of our current understanding of genetics?
3. How did Mendel’s views on inheritance differ from the views of many scientists of
his time?
MAIN IDEA: Mendel’s data revealed patterns of inheritance.
In designing his experiments, Mendel made three important choices that helped him see patterns of inheritance. In the table below, list Mendel’s three choices and write an example
of how he put each of these choices into action.
|Mendel’s Choices |Example |
|4. | |
|5. | |
|6. | |
7. Why did Mendel use pea plants?
Unit 3 Resource Book Study Guide 9
McDougal Littell Biology
STUDY GUIDE, CONTINUED
8. Fill in the sequence diagram below to summarize Mendel’s experimental process.
Bred flowers resulting
in F1 generation with dominant phenotype.
Resulted in F2 generation
with both dominant and
recessive phenotypes.
9. Mendel concluded that traits are inherited as “discrete units.” What do we call these
discrete units today?
10. What two conclusions make up Mendel’s law of segregation?
Vocabulary Check
11. Segregation means “separation.” What is “segregated” in Mendel’s law of segregation?
12. What does “purebred” mean?
10 Study Guide Unit 3 Resource Book
McDougal Littell Biology
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CHAPTER 6
Meiosis and Mendel
Copyright © McDougal Littell/Houghton Mifflin Company.
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CHAPTER 6
Meiosis and Mendel
Copyright © McDougal Littell/Houghton Mifflin Company.
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