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Lessons - Alphabetical Lesson List Advanced Backcross Breeding This lesson is a detailed explanation of the backcross breeding process. Variations based on whether backcrossing is performed with dominant, recessive, or multiple traits are discussed. Calculations associated with backcross breeding are explained. View Print Aparición de resistencia a herbicidas, en una población de malezas El uso repetido del mismo herbicida, puede provocar poblaciones de malezas que consisten de biotipos susceptibles (S) que son controlados y biotipos resistentes (R), que escapan al control para produc... View Print Take Quiz Aplicaciones prácticas de la fisiología de los herbicidas en las plantas View Print Take Quiz Appearance of Herbicide Resistance in a Weed Population Through the repeated use of the same herbicide, weed populations can consist of susceptible (S)-biotypes that are controlled and herbicide resistant (R)-biotypes that are left behind to produce and re... View Print Take Quiz Asteraceae This lesson contains information about the Asteraceae family. View Print Auxin and Auxinic Herbicide Mechanism(s) of Action - Part 1 - Introduction The selective control of broadleaf weeds in cereal grain crops by auxinic herbicides has made this group one of the most widespread and important herbicide families in use. These herbicides were the f... View Print Take Quiz Auxin and Auxinic Herbicide Mechanism(s) of Action - Part 2 - Advanced The selective control of broadleaf weeds in cereal grain crops by auxinic herbicides has made this group one of the most widespread and important herbicide families in use. These herbicides are thoug... View Print Take Quiz Backcross Breeding 1 - Basic Gene Inheritance This lesson reviews the basics of gene inheritance. It compares plants that are homozygous, heterozygous, and hemizgous for an allele and how gene expression is affected by the dominance of an allel... View Print Take Quiz Backcross Breeding 2 - The Backcrossing Process This lesson discusses the final stage of developing genetically engineered crops. The need for backcrossing, and the steps of this breeding method are described. Yield lag, yield drag, and gene stac... View Print Take Quiz Basic Techniques of Plant Tissue Cultures View Print Breeding for Grain Quality Traits: The challenges of measuring phenotypes and identifying genotypes. View Print Take Quiz Case of the Drought Resistant Genetically Engineered Corn Plant This scenario accompanies the online lesson, "Transpiration - Water Movement Through Plants", and is designed to allow you to apply the concepts learned in that lesson to a real-life problem. View Print Take Quiz Clasificación de los herbicidas Esta lección se enfoca en entender el sistema de clasificación en el cual están organizados los herbicidas. Terminología como clasificación, jerarquía de clasificación, ejemplos de clasificac... View Print Take Quiz Corn Breeding: Lessons From the Past This is the first in a series of lessons specifically designed to instruct individuals without any formal training in genetics or statistics about the science of corn breeding. Individuals with forma... View Print Take Quiz Corn Breeding: Introduction to Concepts in Quantitative Genetics This is the second in a series of lessons specifically designed to instruct individuals without any formal training in genetics or statistics about the science of corn breeding. Individuals with form... View Print Take Quiz Corn Breeding: Types of Cultivars This is the third in a series of lessons specifically designed to instruct individuals without any formal training in genetics or statistics about the science of corn breeding. Individuals with formal... View Print Take Quiz Corn Flowers and Hybrid Seeds View Print Corn Rootworm - Part 1: Description of Corn Rootworm and Other Early Season Corn Pests This lesson will discuss the corn rootworm complex, which consists of the northern, western, and southern corn rootworm, focusing on the northern and western species. The information in this lesson ... View Print Corn Rootworm - Part 2: Corn Rootworm Management This lesson will discuss economic thresholds and management options related to the corn rootworm complex consisting of the northern, western, and southern corn rootworm, with emphasis on the norther... View Print Take Quiz Defoliation - Grazing Response View Print Take Quiz Deliberate Mechanical Defoliation of Perennials View Print Take Quiz Descripción de la Ingeniería Genética View Print Take Quiz DNA and DNA Extraction This lesson discusses what DNA is and how it relates to genes and chromosomes. How and why DNA is extracted in the genetic engineering process is also covered. View Print Take Quiz Electrophoresis: How scientists observe fragments of DNA View Print Take Quiz Embryogenesis View Print Erosion View Print Take Quiz Erosion Control Measures This lesson will discuss erosion control practices in the agricultural and construction environments. The impact of erosion management practices will be demonstrated with exercises using a USLE calcul... View Print Take Quiz European Corn Borer and Bacillus thuringiensis This lesson contains information about the history, life cycle, and host plants of the European corn borer and information relating to the history and biology of Bacillus thuringiensis. View Print Take Quiz Flowering Principles View Print Take Quiz Foliar Absorption and Phloem Translocation Herbicides must be absorbed into plants in order to be effective. Herbicide absorption can occur through leaves, roots or both. The process by which herbicides kill weeds, called mode of actio... View Print Take Quiz Gene Cloning This lesson covers the utilization of gene cloning to isolate and copy a specific gene of interest. The transformation of bacteria with plasmids containing antibiotic resistance genes to make gene l... View Print Take Quiz Gene Cloning Part 1: The Mechanics of Recombinant DNA This lesson describes how DNA molecules can be recombined to make recombinant DNA and how special DNA molecules called plasmids allow scientists to clone genes. View Print Take Quiz Gene Cloning Part 2: Making and Screening Gene Libraries This lesson teaches how a specific gene can be identified from among the thousands of genes that can be cloned from an organism. View Print Take Quiz Gene Design 1 - Gene Regions This lesson describes the three gene regions and their roles in gene expression. It also discusses how the regions of a gene can be altered to obtain desired trait expression. View Print Take Quiz Gene Design 2 - Gene Constructs This lesson builds upon the gene region lesson discussing the gene construct of currently used hybrids and explaining how these combinations result in a particular gene expression. View Print Take Quiz Gene Expression Part 1: Reading Genes to Make Proteins This lesson describes the steps involved in a cell as DNA sequence information is read to make RNA and RNA is read to make proteins. View Print Take Quiz Gene Expression Part 2: Expression of Herbicide Resistant ALS Genes in Plants This lesson describes how changes in the DNA sequence of a gene can alter the synthesis of a protein and thus influence traits such as herbicide resistance. View Print Take Quiz Greening Up the Greens - Transpiration Application Scenario View Print Take Quiz Herbicidas que Actúan A través de la Fotosíntesis View Print Take Quiz Herbicide Classification This lesson focuses on understanding the classification system into which herbicides are organized. Terms of classification, classification hierachy, examples of classification and a brief overview ... View Print Take Quiz Herbicide Discovery and Screening Historically, herbicides have been discovered by randomly screening collections of chemicals for activity on target weeds. While totally empirical, this approach has been surprisingly successful and ... View Print Take Quiz Herbicide Resistance: Mechanisms, Inheritance, and Molecular Genetics View Print Take Quiz Herbicides That Act Through Photosynthesis This lesson will examine herbicides that adversely affect light-related processes, thereby causing damage to plants. There are four basic mechanisms that will be studied in this class of agents: her... View Print Take Quiz High School Quiz, Agronomy View Print High School Quiz, Horticulture View Print High School Tree Identification Quiz View Print Inhibidores de la Síntesis de Aminoácidos Aromáticos En esta lección se detallarán los procesos bioquímicos que son afectados por los herbicidas que inhiben la síntesis de aminoácidos en las plantas. Se describirá también la importancia de los am... View Print Take Quiz Inhibitors of Aromatic Amino Acid Biosynthesis This lesson will detail the biochemical mechanisms that are affected by herbicides which inhibit a plant’s ability to synthesize amino acids. The significance of amino acids and proteins will also b... View Print Take Quiz Inhibitors of Fatty Acid Synthesis and Elongation Fatty acid synthesis and fatty acid elongation are two parts of a critically important pathway in plants. The endproducts are essential components of cell membranes, waxes, and suberin. Two chemical f... View Print Take Quiz Just the facts View Print Take Quiz Kid Quiz, Agronomy Questions for kids View Print Kid Quiz, Horticulture View Print Kids Tree Identification Quiz View Print La Interacción de la Luz con las Biomoléculas En esta lección se describe la naturaleza de la luz, la energía de los fotones y como dicha energía puede ser transferida a las biomoléculas. Se describen también tanto los procesos benéficos c... View Print La Transpiración - Movimiento del Agua a Través de las Plantas La transpiración es la pérdida de agua en forma de vapor por las plantas. El agua es absorbida del suelo por las raíces y transportada en forma líquida por el xilema hacia las hojas. En las hojas,... View Print Linkage - Part 1 View Print Take Quiz Linkage - Part 2 View Print Take Quiz Los Pigmentos Vegetales y la Fotosíntesis En esta lección se examinarán las dos principales clases de pigmentos fotosintéticos: las clorofilas y los carotenoides. Se analizarán sus estructuras bioquímicas y su biosíntesis, y se explica... View Print Manure Phosphorus and Surface Water Protection I: Basic Concepts of Soil and Water P View Print Take Quiz Manure Phosphorus and Surface Water Protection II: Field and Management Factors View Print Take Quiz Manure Phosphorus and Surface Water Protection III: Transport Factors View Print Take Quiz Manure Phosphorus and Surface Water Protection IV: Assessment of the Risk of Agricultural P Delivery View Print Take Quiz Marker-Assisted Selection View Print Take Quiz Mecanismo(s) de Acción de las Auxinas y los Herbicidas Auxínicos - Parte 1- Introducción Descripción: El control selectivo de malezas de hoja ancha en cultivos de cereales utilizando herbicidas auxínicos ha hecho de éstos una de las familias de herbicidas actualmente en uso más amp... View Print Mecanismo(s) de Acción de los Herbicidas Auxínicos - Parte 2 - Nivel Avanzado Descripción: El control selectivo de malezas de hoja ancha en cultivos de cereales por los herbicidas auxínicos ha hecho de éstos una de las familias de herbicidas actualmente en uso mas ampliam... View Print Metabolism of Herbicides or Xenobiotics in Plants This lesson will take an indepth view of how plants handle foreign chemicals (xenobiotics) such as herbicides. It will discuss the three main phases that plants use to handle toxic chemicals, which en... View Print Take Quiz Mitosis and Meiosis and the Cell Cycle View Print Take Quiz Module 1: Basic Biotechnology View Print Take Quiz Module 2: Biotechnology and the Consumer View Print Take Quiz Module 3: Biotechnology Practice Applications View Print Take Quiz Module 4: Nutrient Composition View Print Take Quiz Module 5: Allergenicity View Print Take Quiz Native Plant Breeding: Bringing the Beauty of Nature Home View Print Take Quiz Overview of Plant Genetic Engineering Lesson one is a general description of the overall process of genetic engineering. A basic explanation of the five steps for genetically engineering a crop is provided. Details for each step are given... View Print Take Quiz Perennial Plant Response to Defoliation - An Overview View Print Take Quiz Plant Pigments and Photosynthesis This lesson will examine the two major classes of phototsynthetic pigments, chlorophylls and carotenoids, their biochemical structures and their biosynthesis. The organization of these pigments into ... View Print Take Quiz Polymerase Chain Reaction (PCR) The polymerase chain reaction laboratory technique is used in a variety of applications to make copies of a specific DNA sequence. This lesson describes how a PCR reaction works, what it accomplishes... View Print Take Quiz Practical Applications of Herbicide Physiology This lesson will focus on the impact of herbicide and plant characteristics important in determining herbicide performance. Visual images will be used to illustrate several principles including herbic... View Print Take Quiz Producing Grain for Animal, Food, and Industrial Uses View Print Propagation and Procreation - More of a Good Thing -Creating unique individuals or perfect little clones -Genetics of it all--Peas in Darwin's pods View Print Take Quiz Protein Detection in Plants This lesson will focus on molecular principles involved in the detection of biotechnology derived proteins in crops, using the lateral flow ELISA. View Print Take Quiz Quantitative Trait Locus (QTL) Analysis 1 View Print Take Quiz Quantitative Trait Locus (QTL) Analysis 2 View Print Take Quiz Quantitative Traits View Print Take Quiz Real Time PCR - Some Basic Principles Real time PCR is a laboratory technique that can perform relatively accurate, reliable and reproducible measurements, to quantitatively determine the presence of specific gene sequences. Its value is... View Print Take Quiz Root Absorption and Xylem Translocation Overview: Herbicides must be absorbed into plants in order to be effective. Plant roots and below ground shoots have few barriers to herbicide absorption; however, interactions with soil particles ... View Print Take Quiz The Dihybrid Cross and Independent Assortment View Print Take Quiz The Inheritance of Variation View Print Take Quiz The Interaction of Light with Biological Molecules This lesson describes the nature of light, the energy within photons and how this energy may be transferred to biological molecules. In addition, the beneficial and harmful methods for de-exciting mo... View Print Take Quiz The New Bts View Print Take Quiz Theories Behind Plant Tissue Culture View Print Take Quiz Transformation 1 - Plant Tissue Culture This lesson explains the technique of tissue culture as used in plant transformation. It discusses important issues, such as the use of selectable markers, genotype specificity, and tissue culture a... View Print Take Quiz Transformation 2 - Transformation Methods This lesson explains the procedure of introducing a new gene into a plant cell (transformation). It discusses the main goals of the transformation process and describes the four main methods of tran... View Print Take Quiz Transformation 3 - Transformation Events This lesson defines an 'event'. It explains the determining factors specific to an event, the qualities of a desirable event, and the identification and selection of desirable events. View Print Take Quiz Transpiration - Water Movement through Plants This lesson and its animation follows the journey of water through a plant from its uptake by roots to its evaporation from the leaf surface. How this journey is altered by plant characteristics such... View Print Take Quiz Utilization of Grain by Swine and Poultry View Print Total: 96

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This project was supported in part by the National Research Initiative Competitive Grants CAP project 2011-68002-30029 from the USDA National Institute of Food and Agriculture, adminstered by the University of California-Davis and by the National Science Foundation (NSF), Division of Undergraduate Education, National SMETE Digital Library Program, Award #0938034, administered by the University of Nebraska. Any opinions, findings, conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the USDA or NSF.
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