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How much DNA is in every human body?

Dr. Michael Roizen, MD
Internal Medicine
Each cell in the human body contains about 2 meters of DNA that's packed into a tiny nucleus that's only about 5 micrometers in diameter. That's the rough equivalent of stuffing 2,000 miles of sewing thread into a space the size of a tennis ball. As with thread, DNA is wound around spools of proteins called histones. Not all of your DNA gets expressed in every cell; in fact, most of the spools in each cell are stored away, some of which never will be seen or heard of again.
YOU: Having a Baby: The Owner's Manual to a Happy and Healthy Pregnancy

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YOU: Having a Baby: The Owner's Manual to a Happy and Healthy Pregnancy

Can I get a cavity filled while pregnant? Will avoiding spicy foods make my kid a picky eater? Can I really increase my baby's IQ while she's in utero? Whether you're pregnant for the first time,...

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