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Genetics: Understanding DNA

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Alarm Cells (1:29)

Watch this video about alarm cells on HowStuffWorks. Researchers at Vanderbilt University have created a machine that uses living cells to measure toxicity. The hope is to one day make an alarm that can be worn in the field to alert the wearer that... More »

Genetic Code: Video Quiz: Part Two (1:28)

This section offers a quiz for students on the subject of genetics.

Introduction to the Genetic Code (1:58)

Cells were discovered in the 1600s.

Endangered Species: Human Impact (2:06)

The greatest cause of extinction today is people. Humans have interfered with the natural process of evolution, changing the world faster than plant and animal species can adapt.

Water in Our Environment: Surface Water (0:37)

Chemicals from factories, farms, and homes sometimes go directly in freshwater systems. In some cases, this pollution has eliminated all life in certain freshwater sources.

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Assignment Discovery: Cell Reproduction (1:21)

This clip from Assignment Discovery explores the reproduction of cells.

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Human Mutants: Cell Organizer (2:42)

On Discovery Channel's "Human Mutants: The Mystery of Growth," learn about the way cells are organized and arranged in a human body.

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Human Mutants: Adult Conjoined Twins (2:31)

Meet Laurie and Reba Chappelle, conjoined twins, who are connected at the head on Discovery Channel's "Human Mutants: The Mystery of Growth."

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Assignment Discovery: Reproduction and Growth of Cells (3:01)

The reproduction and growth of cells is explained in this clip from Assignment Discovery on "Discovery Channel."

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Assignment Discovery: Obesity Gene Defect (2:36)

Learn about certain genetic defects involving leptin which contribute to obesity on Discovery Channel's "Assignment Discovery."

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Assignment Discovery: Genetic Defect and Leptin (2:58)

Learn about the gene defect that is present in red haired people who are obese on Discovery Channel's "Assignment Discovery."

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Assignment Discovery: Eukaryotic Cells (2:54)

Learn about eukaryotic cells on Discovery Channel's "Assignment Discovery."

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Assignment Discovery: Cell DNA (2:40)

All forms of life have the same base and biochemistry -- cells. The DNA in a cell varies depending on the species. This clip from "Assingnment Discovery" on Discovery Channel shows the differences.

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