Earlier today we had a question about DNA. Do you remember high school biology? If not, pay close attention! DNA is an abbreviation for deoxyribonucleic acid. It is found in all cells and is shaped in the easily recognizable double-helix. The genetic information it contains controls "how the body and all its different parts grow, develop, function, and maintain themselves" (The Human Body Book). Each molecule of DNA is contained in a single chromosome and yet is thought to carry 100,000 genes.
Here's something I don't remember learning from Mrs. Balding: a single stretched-out strand of DNA measures about two inches. Put all of that together and just one of my cells holds 13 feet of DNA. That one cell contains all the information, or programming data, if you will, needed to make me human. Amazing, right?!
Need more? Go here http://www.dnai.org/ or http://www.pbs.org/wnet/dna/. Also, be sure to check out what the people from the Human Genome Project are doing.
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DNA. (2009). In The Human Body Book: An Illustrated Guide to Its Structure, Function and Disorders. Retrieved from http://www.credoreference.com/entry/dkbody/dna
DNA. (2008). In Philip's Encyclopedia 2008. Retrieved from http://www.credoreference.com/entry/philipency/dna