CourseSource: Resources

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 Biology Genetics Introductory Biology

meiosismitosissex determinationAsexual reproductionParthenogenesis

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Simulating Cortical Rotation, Axis Induction, and Experimental Embryology in Amphibian Embryos Using Clay Models

The study of development requires learners to understand spatially complex concepts like embryo anatomy. Embryo anatomy is dynamic over time, and it is often manipulated by researchers in experiments that are fundamental to the field. This spatial...

Courses: Developmental Biology

developmentXenopusfertilizationEmbryologyinductionSymmetry breakingOrganizerCortical rotationPatterning

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Differential Gene Expression during Xenopus laevis Development

In Developmental Biology classes, students are challenged with understanding how differential gene expression guides embryonic development. It can be difficult for students to realize that genes need to be turned on or off at the right time and...

Courses: Developmental Biology

gene expressionXenopusearly developmentembryofertilizationin situ hybridization

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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 Biology Genetics Science Process Skills

meiosisReproductionAneuploidyGameteNon-disjunctionOocyteSpermTrisomy

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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: Genetics Plant Biology Science Process Skills

meiosisphenotypegel electrophoresismicrosatellitesBanding PatternGenetic linkageInheritanceMolecular MarkersPhysical Linkage

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Inexpensive Cell Migration Inquiry Lab using Zebrafish

Cell migration is an important and interesting topic that has the potential to engage students in cell biology by its intrinsically active nature. However, most ways to investigate cell migration require expensive equipment not typically available...

Courses: Cell Biology Science Process Skills

CytoskeletonCell migrationmodel organisms

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Using Zebrafish in a Developmental Biology Lab Course to Explore Interactions Between Development and the Environment

Important learning outcomes for biology students include the ability to develop experiments as well as pull together concepts across their coursework. The field of developmental biology, especially environmental influences on development...

Courses: Developmental Biology Science Process Skills

toxicologymorphogenesisorganogenesis

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The Three Sisters of Agriculture: An Active Learning Activity on Symbiotic Nitrogen Fixation

This active learning exercise introduces students to the plant microbiome and the contributions that bacteria make to plant growth and food production. The Three Sisters are an ancient indigenous practice in which three plant crops and the...

Courses: Microbiology

SymbiosisPlant microbiomeNitrogen fixationNutritional content of foodElectron flowSociety impact of microorganisms

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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: Genetics Science Process Skills

meiosismitosissex determinationAsexual reproductionParthenogenesis

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Linking Genotype to Phenotype: The Effect of a Mutation in Gibberellic Acid Production on Plant Germination

Basic concepts in genetics and plant development are often taught in lecture courses without a lab component. This approach provides students with the content knowledge, but fails to make connections to research opportunities and real-world...

Courses: Cell Biology Developmental Biology Genetics Introductory Biology Plant Biology

geneticsdevelopmentmutationgerminationplantmodel organismGenotype/PhenotypeHormoneSeed

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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 Biology Genetics Introductory Biology

recombinationmeiosisDNA sequenceCrossingoverchromosome structureHolliday junctionhomology

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Cutthroat trout in Colorado: A case study connecting evolution and conservation

Evaluation of evidence is a key process skill for the core competencies of applying the process of science and using quantitative reasoning. This case study enables upper-division biology students to practice these skills by applying evolutionary...

Courses: Evolution Genetics Science Process Skills