This "morph" animation demonstrates how the expression of a particular toolkit gene in a butterfly larva corresponds to the location of the wing eyespots in an adult butterfly.
This animation demonstrates how cancerous cells could be destroyed using a modified virus.
How a cell infected by a virus signals cytotoxic T lymphocytes to kill the cell before the virus replicates and spreads.
Dengue virus has sophisticated mechanisms for entering a cell, for replicating its RNA genome, and for translating proteins.
The ribosome is a molecular factory that translates the genetic information in RNA into a string of amino acids that becomes a protein. Inside the ribosome, the genetic code of the RNA is read three letters at a time and compared with the corresponding code on a transfer molecule. When a match...
“The Assemblers” (Peter Skewes-Cox and Dr. Graham Ruby) sing about DNA and proteins.
How a nerve cell gets its identity, sends axons, and makes connections with other cells.
An overview of embryonic development, the progressive differentiation of cells, and properties of embryonic stem cells.
The role of stem cells in regeneration, and ongoing research to improve mammalian regeneration potency.
Dr. Evans reviews how PPARs regulate body weight by controlling whether fat is burned or stored.
Dr. Barbara Meyer explains the value of studying model organisms and introduces the nematode C. elegans.
Having too many chromosomes can lead to too much gene expression. Dr. Meyer explains how the gene that controls dosage compensation in C. elegans works.
Four lectures highlight the research of two scientists who have made groundbreaking discoveries elucidating the molecular basis of circadian clocks—the internal timekeepers that govern fluctuations in behavior and physiology on a 24-hour cycle.
Although tiny in size, the fruit fly has had a major impact on our understanding of circadian rhythms.
Dr. Rosbash discloses how scientists have persuaded Mother Nature to reveal the inner workings of the fruit fly's biological clock.
Dr. Takahashi describes the powerful strategies that he and others have harnessed for understanding biological clocks in mammals.
To accompany the lecture series Evolution: Constant Change and Common Threads.
Topics include: PCR, DNA Sequencing, Genetic Engineering, and Microarray. This guide includes multiple classroom-ready worksheets to accompany HHMI’s virtual labs.
Topics include: Gene expression, RNA structure and function, transcription, RNA processing, translation, and post-translational events.
Topics include: Gene regulation mechanisms and examples, gene regulation and human disease, and RNA interference.
The human body has at least a trillion ways of recognizing that something foreign has invaded.
A hands-on activity in which students interpret molecular diagrams and build physical models of eukaryotic gene regulation.
The developing brain needs a constant source of new cells as it builds the circuits that will control behavior.
Dr. Elinor Karlsson discusses her work with dogs as a model organism for genomic studies.
... but that's not all they'll do. Several genes determine the diverse shapes and functions of crustacean appendages.