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2008 National DNA Day Online Chatroom Transcript

This is just one question from an archive of the National DNA Day Moderated Chat held in April 2008. 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 long is DNA?
     Samir Kelada, Ph.D., M.P.H.: Identifying genes that confer susceptibility to allergic asthma. Human DNA is 3 BILLION letters long! That's a lot of letters. These 3 billion letters are divided into chromosomes, each of which contains letters that spell out certain RNAs and proteins. We all have 23 pairs of chromosomes, and some are long and some are short.
Daniel in NC (7th grade student)


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