Massachusetts Institute of Technology
Mit: Blossoms: Tissue Specific Gene Expression
How is it that all cells in our body have the same genes, yet cells in different tissues express different genes? A basic notion in biology that most high school students fail to conceptualize is the fact that all cells in the animal or...
PBS
Pbs Learning Media: Gene Control
The development of creatures that appear to have nothing in common is directed by a surprisingly small number of genes. In this video segment, learn about the power of master control genes. Footage from The Secret of Life: "Birth, Sex...
University of Wisconsin
The Why Files: What Is Epigenetics?
Guia Marie Del Prado of the City University of New York explores epigenetics - the control mechanism that tells genes when to play, and when to fold. [3:11]
University of Utah
University of Utah: Learning Center: learn.genetics: Epigenetics: Lick Your Rats
Play the role of a mother rat and lick your pup to see how your nurturing behavior shapes his epigenome. This interactive helps students visualize the nature vs. nurture debate.
Howard Hughes Medical Institute
Hhmi: Biointeractive: Sex Determination: Meiosis
See how an X or Y chromosome carried by a sperm cell, determines the sex of the offspring in this video. [5:52]
University of Utah
University of Utah: Learning Center: learn.genetics: Epigenetics: Twins
Investigate the role the environment plays on gene expression through studies on identical twins. Contains video (4:41).
Khan Academy
Khan Academy: Operons and Gene Regulation in Bacteria
Look at how regulatory DNA sequences can repress or promote gene transcription, particularly in bacteria operons. [10:10]
Khan Academy
Khan Academy: Trp Operon
The trp operon is a well-studied operon when it comes to gene regulation. It is involved in the biosynthesis of the amino acid tryptophan. [6:36]
Khan Academy
Khan Academy: Lac Operon
See an overview of gene regulation in the Lac operon, and listen to a discussion of CAP, cAMP, lac repressor and allolactose in the regulation of lac operon. [11:05]
Khan Academy
Khan Academy: Trp Operon
This video explores the trp operon which is a well researched operon involved in the making of the amino acid trypotophan. [6:36]
Khan Academy
Khan Academy: Tumor Suppressors
Review for the MCAT by watching this video on tumor suppressors. [4:43]
Science Friday Initiative
Science Friday: Science Diction: Genome
In our monthly series on the words of science, we'll talk about how the word 'genome' came to be.
Science Friday Initiative
Science Friday: Picture an Embryo
Why does looking a picture of a human embryo elicit strong feelings?
Science Friday Initiative
Science Friday: A Workout Can Change Your Dna
New research shows that strenuous exercise can change your genes to boost energy metabolism. Listen as the researchers discuss these findings in Science Friday recording. [12 min, 5 secs]
Bozeman Science
Bozeman Science: The Operon
In this video, Paul Andersen describes the elements of an operon. The promoter allows the RNA polymerase to transcribe the required genes. The operator and repressor regulate the expression of the genes by blocking the RNA polymerase.
Bozeman Science
Bozeman Science: Mendelian Genetics
Paul Andersen explains simple Mendelian genetics. He begins with a brief introduction of Gregor Mendel and his laws of segregation and independent assortment. He then presents a number of simple genetics problems along with their answers.
Bozeman Science
Bozeman Science: Gene Regulation
Paul Andersen explains how genes are regulated in both prokaryotes and eukaryotes. He begins with a description of the lac and trp operon and how they are used by bacteria in both positive and negative response. He also explains the...
Bozeman Science
Bozeman Science: Signal Transmission and Gene Expression
Paul Andersen explains how signal transmission is used to alter both cellular function and gene expression. He uses the example of epinephrine release in humans and how it is used in the fight or flight response.
Bozeman Science
Bozeman Science: Evolutionary Significance of Cell Communication
Paul Andersen describes how cell communication is used in both single-celled and multicellular organisms. He starts by describing the symbiotic relationship between the bobtail squid and the bacteria Vibrio fisheri. He explains how...
Bozeman Science
Bozeman Science: Signal Transduction Pathways
Paul Andersen explains how signal transduction pathways are used by cells to convert chemical messages to cellular action. Epinephrine is used as a sample messenger to trigger the release of glucose from cells in the liver. The...
Bozeman Science
Bozeman Science: Effects of Changes in Pathways
Paul Andersen explains how changes in the signal transduction pathway can affect organisms. He begins with a brief discussion of the tetrodotoxin produced by the California Newt. He then explains how anthrax affects adenylate cyclase and...
Bozeman Science
Bozeman Science: Epigenetics
Paul Andersen explains the concepts of genetics. He starts with a brief discussion of the nature vs. nurture debate and shows how epigenetics blurs this distinction. He explains how differentiation of cell types results from the...