Easel by TpT

Genetics with Model Organisms 3: P1, F1, and F2 Problems

Grade Levels
9th - 12th
Resource Type
Formats Included
  • PDF
17 pages
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Want to teach genetics using real organisms actual scientists use instead of cartoon characters or made-up examples? In this lesson illustrated with helpful model organisms who give students tips along the way, students will learn a step-by-step process to complete Punnett square genetics problems. And here is a free PowerPoint with images and videos of the organisms in the tutorial!

This lesson really helps my students understand the reasoning behind genetic crosses that produce F1 and F2 progeny and how to decipher genetics problems that contain these two terms. It reviews the basics of Mendel’s first law (The Law of Segregation) and contains many examples of Mendelian Genetics Problems with simple autosomal dominant and recessive mutation alleles. The most important feature is the organism tips help students to learn how to break down a genetics question and decipher the information from each sentence! Before your students complete this lesson, I highly recommend you use the other products in this series.
Genetics with Model Organisms Series 1: Pre-Punnett Square SkillsGenetics with Model Organisms 2: Punnett Square Skills

When teaching genetics to students with a wide range of abilities, I find some students can teach themselves by reading my tutorial type writing and instructions. For students who need more help, I go through each step of the learning process with them. I project the handout on the wall or smart board and I can fill it out with them, explaining as we fill out example questions together.

In this lesson there are 22 questions (most are multi-step) to help students develop the following skills:
Matching review questions that review the terms: homozygous, heterozygous, recessive, dominant, phenotype, genotype, and gamete
Genetics Question Steps Review
Questions and tips that teach students how to figure out the parents genotypes
Questions and tips that teach students how to determine the characteristics of the F1 offspring
Questions and tips that teach students how to determine the characteristics of the F2 offspring
Questions and tips that teach students how to determine which allele is dominant

Lesson Contents:
Page 1: Matching Review, Introduction to P1, F1, and F2.
Page 2: Example Mendel Cross
Page 3: Second Mendel Cross with Leading Questions
Page 4-8: Problems Practice with Hints that help students conquer questions as they go from easy to more difficult
Page 9: Teacher Instructions
Page 10-16: Teacher Answer Key
Page 17: Terms of Use and Illustrations Copyright Information

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Total Pages
17 pages
Answer Key
Teaching Duration
1 hour
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