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    Science Behind the Lesson
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    X-ploring Fragile X: The Science Behind the Syndrome
    Fragile X Syndrome is an X-linked genetic disorder resulting from the impairment of transcription of the FMR1 gene, producing less to no FMRP protein. FMRP is a translational inhibitor that plays a key role in neurological development. Recent...

    Courses: Biochemistry and Molecular BiologyBiochemistry and Molecular Biology GeneticsGenetics Introductory BiologyIntroductory Biology

    epigeneticsgene regulationtranscriptioncentral dogmatranslationFragile X syndromeSphingosine Metabolism
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    Fragile States: A Case Study Exploring Genetics, Molecular Biology, and Biochemistry Through the Lens of Fragile X Syndrome
    This case aims to strengthen students’ understanding of molecular biology concepts through study of Fragile X Syndrome (FXS). Students begin by learning the cause and phenotypes of FXS and related conditions. Students then apply genetics...

    Courses: Biochemistry and Molecular BiologyBiochemistry and Molecular Biology GeneticsGenetics

    gene regulationtranscriptiontranslationFragile X syndrometriplet repeat expansionsex linkagemetabolic pathway
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    Sex-specific differences in Meiosis: Real-world applications
    In traditional classrooms, students are typically presented with facts that they are asked to memorize and recall during an exam.  The rapid explosion of available scientific facts in recent years has made this model of teaching...

    Courses: Cell BiologyCell Biology GeneticsGenetics Science Process SkillsScience Process Skills

    meiosisReproductionAneuploidyGameteNon-disjunctionOocyteSpermTrisomy
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    Meiosis: A Play in Three Acts, Starring DNA Sequence
    Meiosis is well known for being a sticky topic that appears repeatedly in biology curricula. We observe that a typical undergraduate biology major cannot correctly identify haploid and diploid cells or explain how and why chromosomes pair before...

    Courses: Cell BiologyCell Biology GeneticsGenetics Introductory BiologyIntroductory Biology

    recombinationmeiosisDNA sequenceCrossingoverchromosome structureHolliday junctionhomology
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    Integrating Manipulatives and Animations to Visualize Holliday Junctions
    The complex molecular architecture of Holliday junctions is often challenging for undergraduate biochemistry students to conceptualize. In particular, they have difficulty translating from two-dimensional, linear representations shown in textbooks...

    Courses: Biochemistry and Molecular BiologyBiochemistry and Molecular Biology GeneticsGenetics

    dna structureDNA damageDNA recombinationGene crossoverHolliday junction
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    2023

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    356

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    Interactive Video Vignettes (IVVs) to Help Students Learn Genetics Concepts
    Many video resources exist to teach Mendelian genetics, but most consist of passive delivery of information rather than active construction of knowledge by users. We have created two interactive video vignettes (IVVs) that can be used together or...

    Courses: GeneticsGenetics Introductory BiologyIntroductory Biology Science Process SkillsScience Process Skills

    genotypephenotypeallelespedigreedominanceHardy-Weinberg equilibriumInheritance
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    Why Meiosis Matters: The case of the fatherless snake
    A compelling reason to learn something can make all the difference in students’ motivation to learn it.  Motivation, in turn, is one of the key attitudes that drives learning.  This story presents students with a compelling puzzle of a...

    Courses: GeneticsGenetics Science Process SkillsScience Process Skills

    meiosismitosissex determinationAsexual reproductionParthenogenesis
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    Teaching Genetic Linkage and Recombination through Mapping with Molecular Markers
    Most introductory genetics courses cover genetic linkage, a core concept in the CourseSource genetics learning outcome framework. Although it is a classical genetics topic, genetic linkage remains an important concept to understand in order to...

    Courses: GeneticsGenetics Plant BiologyPlant Biology Science Process SkillsScience Process Skills

    meiosisphenotypegel electrophoresismicrosatellitesBanding PatternGenetic linkageInheritanceMolecular MarkersPhysical Linkage
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    Why do Some People Inherit a Predisposition to Cancer? A small group activity on cancer genetics
    Before undergraduate students take a genetics course they generally know cancer has a genetic basis and involves the proliferation of cells; however, many are uncertain about why only a subset of people have a predisposition to cancer and how that...

    Courses: GeneticsGenetics Science Process SkillsScience Process Skills

    cancerInheritance patternsProbability calculationProto-oncogeneTumor Suppressor Gene
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    A Muscular Dystrophy Case Study Illustrating the Phenotypic Effects of Mutation
    Mutations in genes can lead to a variety of phenotypes, including various human diseases. Students often understand that a particular mutation in a single gene causes a disease phenotype, but it is more challenging to illustrate complex genetic...

    Courses: Developmental BiologyDevelopmental Biology GeneticsGenetics

    mutationProtein Structureethicscentral dogmahuman disease
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    Fruit Fly Genetics in a Day: A Guided Exploration to Help Many Large Sections of Beginning Students Uncover the Secrets of Sex-linked Inheritance
    Moving beyond the basic concepts of autosomal Mendelian inheritance to sex-linkage can be difficult for introductory biology students. Although crosses with Drosophila fruit flies have long been a mainstay of genetics units that teach these...

    Courses: GeneticsGenetics

    Mendelian Geneticsfruit fly biologysex-linked inheritance
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    Homologous chromosomes? Exploring human sex chromosomes, sex determination and sex reversal using bioinformatics approaches
    Constructing a robust understanding of homologous chromosomes, sex chromosomes, and the particulate nature of genes is a notoriously difficult task for undergraduate biology students. In this lesson, students expand their knowledge of human...

    Courses: BioinformaticsBioinformatics GeneticsGenetics Introductory BiologyIntroductory Biology Science Process SkillsScience Process Skills

    bioinformaticsautosomehomologous chromosomeshomologous recombinationsex chromosomesex determinationsex reversal mutations
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    Meiosis Remodeled: Inclusion of New Parts to Poppit Bead Models Enhances Understanding of Meiosis
    A long-standing tradition uses strings of poppit beads of different colors to model meiosis, especially to show how segments of paired homologous chromosomes are recombined. Our use of orthodontic latex bands to model cohesion of sister...

    Courses: Cell BiologyCell Biology GeneticsGenetics Introductory BiologyIntroductory Biology

    meiosischiasma formationchromosome recombination
    Science Behind the Lesson
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    The Science Behind Parthenogenesis: Interesting things happen when meiosis goes “wrong”
    Parthenogenetic reproduction is a fascinating, complex topic.  This article accompanies “Why Meiosis Matters: The case of the fatherless snake.” It summarizes the basic information an introductory biology or genetics instructor...

    Courses: Cell BiologyCell Biology GeneticsGenetics Introductory BiologyIntroductory Biology

    meiosismitosissex determinationAsexual reproductionParthenogenesis
    Science Behind the Lesson
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    The Science Behind the ACTN3 Polymorphism
    A common polymorphism in the alpha-actinin-3 (ACTN3) gene results in the lack of ACTN3 protein expression in fast twitch muscle fibers in ~16% of the human population (1). This genetic change has been linked with muscle performance in humans (2)...

    Courses: Anatomy-PhysiologyAnatomy-Physiology GeneticsGenetics

    protein structure and functionhuman genetic variationskeletal muscle physiology
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    The ACTN3 Polymorphism: Applications in Genetics and Physiology Teaching Laboratories
    Inquiry-based undergraduate laboratories provide the opportunity to engage students in a research experience that improves scientific thinking, but such activities can be difficult to develop and implement due to limited time and resources. We...

    Courses: Anatomy-PhysiologyAnatomy-Physiology GeneticsGenetics

    protein structure and functionhuman genetic variationmuscle physiology
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    The Great Petunia Carnage of 2017: A Clicker Case Study Using Petunias to Describe the Effect of Genetic Modification on the Biochemistry of Flower Color and Phenotype in Plants
    In this single class period case study, students examine the difference between genotype and phenotype by studying the mechanisms by which commercially available petunias have been bred to have different phenotypes (flower colors). Students review...

    Courses: GeneticsGenetics Introductory BiologyIntroductory Biology Plant BiologyPlant Biology

    case studyGenetic ModificationsBiochemistry of Flower ColorGMO regulationsGenotype-Phenotype Connections
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    You and Your Oral Microflora: Introducing non-biology majors to their “forgotten organ”
    With limited time available for laboratory activities, introductory science courses for non-science majors typically use the laboratory period to reinforce material that was previously presented during lecture. This practice was true of a human...

    Courses: GeneticsGenetics Introductory BiologyIntroductory Biology MicrobiologyMicrobiology Science Process SkillsScience Process Skills

    bacteriamicrobiomeBLASTmicrobesDNA replicationPolymerase chain reaction (PCR)
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    Honoring the Complexity of Genetics: Exploring the Role of Genes and the Environment Using Real World Examples
    Historically, undergraduate genetics courses have disproportionately focused on the impact of genes on phenotypes, rather than multifactorial concepts which consider how a combination of genes, the environment, and gene-by-environment interactions...

    Courses: EvolutionEvolution GeneticsGenetics Introductory BiologyIntroductory Biology

    genesenvironmentMendelQuantitative traitsMultifactorialGene by environment interactions
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    A Kinesthetic Modeling Activity to Teach PCR Fundamentals
    Most molecular biology and biological sciences students understand that the polymerase chain reaction (PCR) is used to amplify DNA. However, we have found that some students experience conceptual misunderstandings, a lack of detailed comprehension...

    Courses: GeneticsGenetics Science Process SkillsScience Process Skills

    PCR