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Understanding Patterns of Inheritance: Co-Dominance, Incomplete Dominance, and Sex-Linked Traits

This lesson plan introduces students to different patterns of inheritance, including co-dominance, incomplete dominance, and sex-linked traits. Students will engage in independent work to complete a worksheet that evaluates their understanding of these concepts. The goal is for students to be able to identify and describe each type of inheritance by the end of the class. Through examples like hemophilia and genetic recombination, students will enhance their grasp of the mechanisms that govern heredity and genetic variation.

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Understanding Patterns of Inheritance: Co-Dominance, Incomplete Dominance, and Sex-Linked Traits

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Presentation Transcript

  1. Alternative Patterns of Inheritance • Warm-Up • Objective • Powerpoint • Packet/book work – what you don’t finish is HW • Exit Ticket • Name and describe an example of genetic recombination.

  2. Objective • Students will demonstrate understanding of the different types of inheritance (co-dominance, sex-linked, incomplete dominance) by independently completing a worksheet. • By the end of class today, you will be able to identify and describe codominance, incomplete dominance, and sex-linked inheritance

  3. Co-Dominance Incomplete Dominance

  4. Co-Dominance • There are multiple dominant alleles that are both expressed in the phenotype. • If there are multiple Dominant alleles, how would you write that? Aa wouldn’t be enough.

  5. Incomplete Dominance • Neither allele is dominant, so the heterozygote creates a combined phenotype. • What’s the difference between incomplete dominance and co-dominance?

  6. Sex-linked • When an allele is on a sex-chromosome. • Hemophilia is x-linked recessive. What does this mean? • Why are men more likely to get hemophilia?

  7. Exit Ticket • Which type of inheritance is demonstrated by the picture? How can you tell. • 3 sentence limit

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