Expand your students’ understanding of genetics with this Grade 10 BC Curriculum–aligned worksheet on Complex Inheritance, designed to build on Mendelian concepts and introduce the real-world patterns that shape most traits in living organisms. This resource helps students move beyond simple dominant-recessive rules and explore how alleles can interact in more complex and varied ways.

Students will learn about incomplete dominance, where neither allele is fully dominant, resulting in blended traits—such as pink snapdragon flowers produced from red and white parents. The worksheet also covers codominance, where both alleles are expressed equally, illustrated through human ABO blood types and the presence of both A and B markers in type AB blood.

In addition, students are introduced to polygenic inheritance, where multiple genes influence a single trait. Examples like human skin colour help learners understand why many characteristics show wide variation and cannot be predicted with a simple Punnett square. These concepts reinforce how genetics contributes to the biological diversity found across populations.

Clear explanations, models, and guided questions help students compare different inheritance patterns and apply them to real scenarios. The included answer key supports self-assessment and efficient grading, making the resource ideal for class instruction, homework, review, or independent practice.

This worksheet encourages deeper scientific thinking and provides a fuller picture of how complex interactions between genes contribute to the traits we observe in the living world.

📦 What’s Included

• Worksheet
  
• Answer Sheet
  
• Digital + Printable PDF formats
  

🖨️ Formats Included

• Printable PDF for classroom, homework, or independent study