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Chapter 6: Gregor Mendel and Genetics

Difficulty Level: At Grade Created by: CK-12
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Alois Staudacher. www.flickr.com/photos/alois_staudacher/9232685710/. CC BY 2.0.

Gregor Mendel and Genetics


Lesson 6.1: Mendel’s Investigations

6.1.1 Mendel and His Pea Plants

  • Blending Theory of Inheritance
  • Why Study Pea Plants?
  • Controlling Pollination

6.1.2 Mendel’s First Set of Experiments

  • F1 and F2 Generations
  • Law of Segregation

6.1.3 Mendel’s Second Set of Experiments

  • F1 and F2 Generations
  • Law of Independent Assortment

6.1.4 Mendel’s Laws and Genetics

  • Rediscovering Mendel’s Work
  • Genetics of Inheritance
  • Genotype and Phenotype

Lesson 6.2: Mendelian Inheritance

6.2.1 Probability

6.2.2 Probability and Inheritance

  • Probability and Gamete Formation
  • Probability and Fertilization

6.2.3 Using a Punnett Square

  • Predicting Offspring Genotypes
  • Predicting Offspring Phenotypes
  • Determining Missing Genotypes
  • Punnett Square for Two Characteristics

6.2.4 How Mendel Worked Backward to Get Ahead

6.2.5 Non-Mendelian Inheritance

  • Codominance and Incomplete Dominance
    • Codominance
    • Incomplete Dominance
  • Multiple Alleles
  • Polygenic Characteristics
  • Effects of Environment on Phenotype

Pacing the Lesson

Use the Class Periods per Lesson table below as a guide for the time required to teach the lessons of this chapter.

Lesson Number of Class Periods
6.1 Mendel’s Investigations 2.5
6.2 Mendelian Inheritance 2.5
  • Class periods are assumed to be 60 minutes long.

Online Resources

See the following Web sites for appropriate laboratory activities. They allow students to simulate Mendel’s experiments. (Lesson 6.1)

This Web site has links to information, activities, and videos about Mendel and genetics:

Students can learn about Mendelian inheritance with this fun activity:

Chapter Outline

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