Why do traits vary, and why do they vary even between parents and offspring and among siblings?

Chapter 1 Lessons

• Lesson 1.1: Pre-Unit Assessment
• Lesson 1.2: Introducing Spider Silk Research
• Lesson 1.3: Surprising Spider Silk
• Lesson 1.4: Observing Proteins and Variation
• Lesson 1.5: Investigating Proteins and Traits

Chapter 2 Lessons

• Lesson 2.1: “Hemophilia, Proteins, and Genes”
• Lesson 2.2: Gathering Evidence About Genes
• Lesson 2.3: Investigating Gene Copies
• Lesson 2.4: Applying Ideas About Genes

Chapter 3 Lessons

• Lesson 3.1: “Why Are Identical Twins Rare?”
• Lesson 3.2: Gathering Evidence About Inheritance
• Lesson 3.3: Analyzing Variation and Reproduction
• Lesson 3.4: Critical Juncture Assessment
• Lesson 3.5: Revisiting Key Concepts
• Lesson 3.6: Reproduction in Darwin’s Bark Spiders

Chapter 4 Lessons

• Lesson 4.1: Analyzing Evidence
• Lesson 4.2: Science Seminar
• Lesson 4.3: Writing a Scientific Argument
• Lesson 4.4: End-of-Unit Assessment

Review Material:

• Quizlet
• Quizziz