Tag: dihybrid

  • Corn Chi Square (remote)

    Corn Chi Square (remote)

    This is the remote version of a classroom activity I do with corn ears. Students would count the kernels (smooth, wrinkled, purple, yellow) and determine if the ears of corn are the result of a dihybrid cross, RrPp x RrPp. This gives students the opportunity to apply statically analysis to data sets and determine if…

  • 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…

  • Horse Genetics

    Horse Genetics

    Practice genetic crosses with horse traits. The gait-keeper gene controls whether a horse will trot or pace and the flaxen gene determines mane color.

  • 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…

  • Genetic Crosses with 2 Traits with Rabbits

    Genetic Crosses with 2 Traits with Rabbits

    Beginning biology students can struggle with dihybrid crosses and setting up Punnett squares that have two traits.  When tackling this concept, make sure students are familiar and competent with basic genetic crosses and setting up Punnett squares for a single trait. For example, a tall (Tt) plant is crossed with a short plant (tt). Once…

  • Modeling Independent Assortment & Dihybrid Crosses

    Modeling Independent Assortment & Dihybrid Crosses

    Students examine how two traits are inherited, revealing that each allele has an equal chance of being passed on to the next generation, the principle of independent assortment.

  • Corn Genetics and Chi Square Analysis

    Corn Genetics and Chi Square Analysis

    Students count kernels on an ear of corn. The corn is the product of a dihybrid cross, so that the phenotype of the kernels will follow a 9:3:3:1 ratio.

  • Dihybrid Crosses in Guinea Pigs

    Dihybrid Crosses in Guinea Pigs

    Teaching dihybrid crosses can be challenging because it involves layering several biological concepts, like independent assortment and statistics. This worksheet illustrates how gametes are formed from the parents and used to create a 4×4 punnet square that is used in basic genetic problems.