DNA is made up of units called nucleotides. Nucleotide contains a sugar(deoxyribose sugar), a phosphate group and a nitrogenous base.
DNA in all humans is 99.9 percent identical. It is about one tenth of one percent that makes us all unique, or about 3 million nucleotides difference.
A simple list of the bases of the entire DNA is enough to fill 200 New York City phone books.
DNA testing can determine if crops are authentic or if certain gourmet foods such as caviar and wine are authentic.
The only cells in the human body that do not contain DNA are red blood cells.
Our genes are remarkably similar to those of other life forms. For example, we share 98% of our genes with chimpanzees, 90% with mice, 85% with zebra fish, 21% with worms.
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