Tag: genotype

  • Peas, Please! – A Practice Set on Mendelian Genetics

    Peas, Please! – A Practice Set on Mendelian Genetics

    Students practice assigning genotypes (PP, Pp, or pp) to different traits based on whether the trait is dominant or recessive. They set up Punnett squares, and determine the phenotypic ratios of the offspring.

  • Genetic Crosses in Rabbits (Remote)

    Genetic Crosses in Rabbits (Remote)

    Students learn how to do Punnett squares with two traits by practicing completing 4×4 squares.

  • Genetics Practice Problems with Google Slides

    Genetics Practice Problems with Google Slides

    For students who are learning remotely, genetics lessons that involve Punnett squares and probability may be challenging.¬† In a traditional class, I would give students small whiteboards and we would practice doing crosses together. I could circulate around the room to help students who are struggling, and they could help each other.¬†Plus, they love writing…

  • Genetic Crosses – 2 Traits

    Genetic Crosses – 2 Traits

    This worksheet was designed for freshman learning dihybrid crosses. Students struggle with setting up Punnet squares, so the squares are set up for them at first. Students only need to fill in the letters of the genotype can determine the phenotype proportions. A final task requires students to set up their own 4×4 square when…

  • Genetics of Chicken Combs

    Genetics of Chicken Combs

    The combs of chickens are controlled by four alleles, which interact to produce four distinct phenotypes: single, rose, pea, and walnut. In this exercise, students predict the outcomes of chicken crosses. Ideally, students should already know how to do crosses that involve two traits, the mechanisms for solving these problems are similar. My honors biology…

  • Case Study: How Do Genes Determine Skin Color?

    Case Study: How Do Genes Determine Skin Color?

    This case study focuses on a news story whose headline declares that a “mother is a the only black woman to give birth to two white babies.”    Students look past the sensationalized headline to discover how skin color is controlled by multiple genes and make a final judgement about whether statements made in the…

  • Analyzing Human Pedigrees

    Analyzing Human Pedigrees

    Examine pedigrees to determine carriers in a family and inheritance patterns.