1. Chromosomes and Genes: TEKS 7.14C To the teacher: This CPO Science PowerPoint presentation is designed to guide you through the process of presenting the lesson to your students. The presentation uses a 5-E teaching model: Engage, Explore, Explain, Elaborate, and Evaluate. The PowerPoint Slide notes indicate where you may want to bring in various lesson elements such as quizzes, readings, investigations, animations, and practice materials. Additional science background information is provided in the slide notes where appropriate. You can view these notes by selecting “View,” then “Normal.” You will see the notes pane at the bottom of the PowerPoint workspace. Additionally, the slide notes are available as a separate document, accessible from the lesson home page. The slides that follow are intended for classroom use.

2. Chromosomes and Genes: TEKS 7.14C What’s the connection? Here’s an image of some common dog breeds. Notice how the traits of each dog differ. The diagram shows DNA in the form chromosomes in the nucleus of a cell. How are these two images related?

3. Chromosomes and Genes: TEKS 7.14C Time to investigate! Complete the lesson investigation: – Observing Human Traits

4. Chromosomes and Genes: TEKS 7.14C Why is that flower purple? gene - a unit that determines traits alleles - different forms of a gene dominant allele - the form of a gene that, when present, covers up the appearance of the recessive allele recessive allele - the form of a gene that is hidden when the dominant allele is present

5. Chromosomes and Genes: TEKS 7.14C Punnett squares A punnett square shows all of the possible combinations of alleles from the parents. Here are some examples:

6. Chromosomes and Genes: TEKS 7.14C Time for practice! Complete the lesson practice activity: – Genetics Vocabulary

7. Chromosomes and Genes: TEKS 7.14C Show what you know! Try the lesson’s interactive quiz, or complete a quiz that your teacher can print out for you. Hint: – You might want to review your lesson reading piece one more time before trying the quiz.