2009 National DNA Day Online Chatroom Transcript

This is just one question from an archive of the National DNA Day Moderated Chat held in April 2009. The NHGRI Director and many genomics experts from across NHGRI took questions from students, teachers and the general public on topics ranging from basic genomic research, to the genetic basis of disease, to ethical questions about genetic privacy.

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How many strands make up a DNA double helix?      Arjun Prasad, B.S.: My research area involves comparing genome sequences of different animals to understand how they are related and how genomes evolve. We call DNA a double helix because there are two phosphate backbones that hold together the bases. Palms Middle School in CA (7th grade teacher)

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