Engage your biology students with this hands-on worksheet that explores codominance, multiple alleles, and blood type inheritance through Punnett square analysis! Students will practice predicting genotypes and phenotypes using real-world examples of human blood types (A, B, AB, and O).

This resource helps students connect genetic patterns to a familiar concept — blood types — while reinforcing key terms like alleles, genotype, phenotype, dominant, recessive, and codominance.

What’s Included:

• Short background reading on how blood types are inherited
• Step-by-step Punnett square examples
• Five practice problems that increase in difficulty with answer key
• Colorful layout for easy classroom or clean white layout for homework use
• Great for Genetics Units, Intro to Codominance, or Review before exams
  

Skills Covered:

• Identifying genotype → phenotype relationships
• Applying Punnett squares for multiple alleles
• Understanding codominance and recessive inheritance
• Using real-life examples to interpret human genetics