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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
    Lesson
    1534

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    216

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    Make It Stick: Teaching Gene Targeting with Ribbons and Fasteners
    Manipulating gene expression is a commonly used tool to study the effect of a single gene or the hierarchy of gene networks in many different biological disciplines. When working with mice, the most commonly used techniques to manipulate genes...

    Courses: Developmental BiologyDevelopmental Biology GeneticsGenetics

    mathematical modelhomologous recombinationCre/loxgene targeting
    Lesson
    1585

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    466

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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
    Lesson
    2266

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    253

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    Escape Zoom!: Reviewing Introductory Evolution Content Using an Escape Room Format
    Reviewing and integrating key concepts and learning goals at the end of a biology course can be overwhelming to students and instructors alike. Often end-of-term review sessions in preparation for final exams are heavily based on memorization, and...

    Courses: EcologyEcology EvolutionEvolution GeneticsGenetics

    Evolutionartificial selectionSpeciationextinctionsexual selectionphylogenetic treesmechanisms of evolution
    Lesson
    1784

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    420

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    Does it pose a threat? Investigating the impact of Bt corn on monarch butterflies
    Aspiring scientists know that a hallmark of science is that experiments are repeatable and testable.  However, students do not often get opportunities to explore the replicability of science.  Using a current “hot topic” of...

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

    ecologyCommunity EcologyBt cornGenetic modificationMonarch butterflies
    Lesson
    3176

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    257

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    Application of a Bacterial Experimental Evolution System to Visualize and Teach Evolution in Action: A Course-Based Undergraduate Research Experience
    Concepts of evolution are typically taught through examples of extremely long timescales, which do not always resonate broadly. Here, we describe a course-based undergraduate research experience tailored for junior and senior undergraduate biology...

    Courses: Biochemistry and Molecular BiologyBiochemistry and Molecular Biology BioinformaticsBioinformatics Cell BiologyCell Biology EvolutionEvolution GeneticsGenetics MicrobiologyMicrobiology

    EvolutionmutationcompetitionNatural Selectionregulationstructure and functionreproductive fitnessgenotype to phenotypehomologs
    Lesson
    2246

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    278

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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)