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Biology Educational Websites

DNA Learning Center

interactives to learn more about DNA

Talking Glossary of Genetic terms

can dowload an app

Animated Genome video


animated videos of cell


Time line of human genome


DNA--unlocking life's code

Interactives and additional information about DNA from the Smithsonian's National Museum of Natural History

human reproduction resources about puberty and sex


Mechanisms that increase Genetic Variation


Genetics Preview

6 min

Genetics song video


Mendelian Genetics

17min video

Biological Inheritance--Bill Nye (greatest science)


Genetics Review

19min video

Punnett Squares

10 min

Genotypes and Phenotypes

10min video

Genotype Expression


Gene Regulation


GENEtics video

3:41 min

Linked Genes

17 min video

Central Dogma and Transcription


DNA and RNA part 2


What is DNA?


DNA and RNA part 1

Bozeman Science


Pedigrees and Genetics   14 minto go with chapter 7

Gene Linkage video (14 min)   Bozeman Science

Injury and Recovery

from 2014 olympics




12 min video

Images from ISS timelapsed of Earth

 Man (or woman) can only dream what it looks like hovering above earth watching the beauty of science orbit beneath them. Thanks to the ISS (International Space Station) we have the next best thing, a timelapse. “Some interesting tidbits about the ISS. It orbits the planet about once every 90 mins and is about 350 Km/217 miles. The yellow/greenish line that you see over the earth is Airgolw.

Airglow is caused by various processes in the upper atmosphere, such as the recombination of ions which were photoionized by the sun during the day, luminescence caused by cosmic rays striking the upper atmosphere, and chemiluminescence caused mainly by oxygen and nitrogen reacting with hydroxyl ions at heights of a few hundred kilometers. It is not noticeable during the daytime because of the scattered light from the Sun.

Even at the best ground-based observatories, airglow limits the sensitivity of telescopes at visible wavelengths. Partly for this reason, space-based telescopes such as the Hubble Space Telescope can observe much fainter objects than current ground-based telescopes at visible wavelengths.

The airglow at night may be bright enough to be noticed by an observer, and is generally bluish green in color. Although airglow emission is fairly uniform across the atmosphere, to an observer on the ground it appears brightest at about 10 degrees above the horizon, because the lower one looks the greater the depth of atmosphere one is looking through. Very low down, however, atmospheric extinction reduces the apparent brightness of the airglow.

One airglow mechanism is when an atom of nitrogen combines with an atom of oxygen to form a molecule of nitric oxide (NO). In the process a photon is emitted. This photon may have any of several different wavelengths characteristic of nitric oxide molecules. The free atoms are available for this process because molecules of nitrogen (N2) and oxygen (O2) are dissociated by solar energy in the upper reaches of the atmosphere, and may encounter each other to form NO.