2010 National DNA Day Online Chatroom Transcript

This is just one question from an archive of the National DNA Day Moderated Chat held in April 2010. 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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Is there any difference in the way that identical twins' DNA is expressed?      Barbara Biesecker, M.S.: Barb Biesecker directs the JHU/NHGRI Genetic Counseling Training Program and has been doing genetic counseling for thirty years. Her primary interests are in achieving quality of life for those affected with a genetic condition or at risk. Yes! And this is a really good question. Differences in gene expression contribute to why there are subtle differences in how identical twins look. Belle HS in MO (11th grade student)

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