GENETICS : LAW OF GRADE 12 SUBJECT LIFE SCIENCE WEEK 12 TOPIC DOMINANCE Lesson 3 Time: 40 min LESSON SUMMARY FOR: DATE STARTED: DATE COMPLETED: The learners must be able to: Solve a genetics problem using a specific format of Punnet squares or test cross LESSON OBJECTIVES Write down phenotype and genotype ratios of the P1, P2 F1 and F2 generations Solve genetic problems on complete dominance LEARNER ACTIVITIES TIMING RESOURCES NEEDED TEACHER ACTIVITIES Learners work on their own to solve questions 10 min CAPS Solutions for All – Life Introduction: based on Law of Dominance Science Gr 12 by McMillan Teacher revises Mendel’s Laws highlighting what dominant and recessive is, using examples. Learners copy the following diagram of a Punnett SIIP Booklets for 2014 In pea plants, the allele for red flowers is dominant and is square for example 1. represented by the letter “R”. The allele for white flowers is compiled Question papers recessive and represented by the letter “r” Key : B (black) and answer booklets b ( brown) Main Body (Lesson presentation): Teacher: Worksheets Provides worksheet for learners with the following questions / 20min tasks/ activities. F1 – all heterozygous Focus on Life science CAPS Gr 12 by Maskew Miller black- genotype Activities on worksheet drawn up by teacher from textbooks/ past exam papers. phenotype100% Understanding Life science Gr.12 by T Isaac – 3rd black How would you represent the genotype of each of the following Edition pea plant? Homozygous dominant Life Science Gr 12 – Top Class by Shuter’s. Heterozygous Homozygous recessive Via Afrika Life Science GR 12 (CAP Describe the phenotypes represented by the following
GRADE 12 SUBJECT LIFE SCIENCE WEEK 12 TOPIC GENETICS : LAW OF DOMINANCE Time: 40 min Lesson 3 LESSON SUMMARY FOR: DATE STARTED: DATE COMPLETED: LESSON OBJECTIVES The learners must be able to: Solve a genetics problem using a specific format of Punnet squares or test cross Write down phenotype and genotype ratios of the P1, P2 F1 and F2 generations Solve genetic problems on complete dominance TEACHER ACTIVITIES LEARNER ACTIVITIES TIMING RESOURCES NEEDED Introduction: Teacher revises Mendel’s Laws highlighting what dominant and recessive is, using examples. In pea plants, the allele for red flowers is dominant and is represented by the letter “R”. The allele for white flowers is recessive and represented by the letter “r” Main Body (Lesson presentation): Teacher: Provides worksheet for learners with the following questions / tasks/ activities. Activities on worksheet drawn up by teacher from textbooks/ past exam papers. How would you represent the genotype of each of the following pea plant? Homozygous dominant Heterozygous Homozygous recessive Describe the phenotypes represented by the following Learners work on their own to solve questions based on Law of Dominance Learners copy the following diagram of a Punnett square for example 1. Key : B (black) b ( brown) F1 – all heterozygous black- genotype phenotype100% black 10 min 20min CAPS Solutions for All – Life Science Gr 12 by McMillan SIIP Booklets for 2014 compiled Question papers and answer booklets Worksheets Focus on Life science CAPS Gr 12 by Maskew Miller Understanding Life science Gr.12 by T Isaac – 3rd Edition Life Science Gr 12 – Top Class by Shuter’s. Via Afrika Life Science GR 12 (CAP
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