Tag: genetics

  • Genetics – Lop Ears

    Genetics – Lop Ears

    This worksheet allows students to practice doing genetic crosses that involve two traits. The first problem has the 4×4 Punnet square already set up. Once they fill out the square, they determine how many of the bunnies have floppy or long ears, and how many have black or pink noses. Note, these genetic traits are…

  • Dog Tales – NOVA

    Dog Tales – NOVA

    Worksheet for the NOVA program “Dog Tales” which explores the evolution and domestication of dogs. Includes multiple choice questions with a final reflection.

  • Pedigree Analysis – AP Bio

    Pedigree Analysis – AP Bio

    Designed for biology students studying genetics. Determine the inheritance pattern for human disorders, like Tay-Sachs or Marfan Syndrome.

  • 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…

  • Genetics: Sexy Chickens

    Genetics: Sexy Chickens

    This worksheet was designed for advanced students of biology or for honors students who are ready for an extra challenge. Birds have a ZW sex determination system instead of the XY system seen in humans. If your students have a good grasp on sex-linked traits in humans, then this scenario is a way to really…

  • Genetics of Sickle Cell

    Genetics of Sickle Cell

    This assignment was created for students who miss class and can be completed independently. There are sections to read with questions to answer, focusing on how DNA provides the instructions to make protein. A single base substitution in the gene that codes for hemoglobin results in sickle cell anemia. Students are walked through the process…

  • 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…

  • Pedigrees – Human Genetic Disorders

    Pedigrees – Human Genetic Disorders

    Students practice identifying genotypes on pedigree charts. Focus on human genetic diseases, such as albinism, dwarfism, tay-sachs, and sickle cell anemia.

  • Genetics Practice Problems – Easy Mode

    Genetics Practice Problems – Easy Mode

    This worksheet was created for an introductory level biology class. This worksheet is designed to move through difficulty levels, so students start with “easy mode,” then moving to “normal” and then finally “hard mode.” Students can move at their own pace, which instructors can help students who are struggling.

  • Investigation: Gel Electrophoresis and DNA

    Investigation: Gel Electrophoresis and DNA

    This procedural lab is a great compliment for genetic studies where students learn about sex linked genes and mutations.   The allele for Duchenne Muscular Dystrophy is located on the X chromosome and is associated with a deletion mutation for that region. 

  • Case Study: How Do Tibetans Survive High Altitudes

    Case Study: How Do Tibetans Survive High Altitudes

    Based on the Berkeley website: Understanding Evolution, this version focuses on the how the body maintains homeostasis at high altitudes.   This involves increased production of red blood cells to improve oxygen supplies to tissues.    Tibetan populations have adapted to high altitudes by producing fewer red blood cells which improves fetal mortality rates. Case looks…

  • Dog SNPs and Curly Hair

    Dog SNPs and Curly Hair

    In an effort to add more real data to the DNA (genetics) unit, I added a shortened form of the HHMI activity:  “Mapping Genes to Traits in Dogs Using SNPs”   The activity on HHMI is too advanced for freshman level biology, but I thought it would be a good introduction to DNA sequences. The activity…

  • 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…

  • DNA, Proteins, and Mutations

    DNA, Proteins, and Mutations

    Students explore how DNA becomes a function protein by using a codon chart to transcribe and translate a gene.  They compare the gene found in humans to that found in other animals, deducing that the genes are very similar with only slight changes.    Finally, students examine the different types of mutations and how a…