Human embryonic development depends on stem cells. During the course of development, cells ...
The inner cell mass (ICM) cells of blastocyst-stage early human embryos can be removed and ...
A quarry site in Nevada carries the evolutionary history of a population of stickleback fish ...
Regulatory switches are found upstream from a gene. Regulatory molecules bind to the switches ...
In the stickleback fish, pelvic-fin reduction resulted from changes in the regulatory switch ...
In two related Drosophila species, a so-called paintbrush gene is activated to paint the pigment ...
The rock pocket mouse is found in two color variants, or morphs: light and dark. In different ...
This simulation shows the spread of a favorable mutation through a population of pocket mice. ...
This animation shows a rotating 3-D image of a stickleback skeleton. The pelvic region, ...
This morph animation demonstrates how the expression of a particular toolkit gene in a butterfly ...
This video gives a brief introduction to how stickleback fossils are collected and used to study ...
Native Mexican farmers bred corn from teosinte. Teosinte plant and seed were different from ...
The many forms of dogs that exist today were all created through selective breeding from the ...
Male courtship dances in two fruit fly species show that the wing spots play a prominent role.
These are some of the animal species Charles Darwin would have seen when he visited the ...
At the end of the ice age, the retreating ice sheet created many new lakes, some of which were ...
Fossils are our window to the past. Fossil records provide important information about how ...
Dr. Ronald Evans discusses the so-called marathon mouse, with a mutation in the PPAR-gamma gene, ...
Dr. Evans compares the activity of a normal mouse to one with a mutation in a key gene ...
Dr. Evans asks students if they think environment or genetics would most influence obesity, then ...
What do humans, flies, and worms have in common? More than you might think. See how transgenic ...
Dr. Huda Zoghbi interviews Milan Cloud, a patient who has inherited the neurological disorder ...
Dr. Zoghbi introduces the topic of Rett syndrome by showing how development usually progresses ...
Dr. Zoghbi shows how a mouse that has been given the gene responsible for Rett syndrome exhibits ...