Question

Hi, i have a question bothering my mind:
Does DNA exist in every cell in our body, like bone cell, hair cell, blood cell?

Answer 1

For the most part yes, but you mentioned an important exception: red blood cells. During erythrocyte development, the nucleus (housing the DNA) is ejected, presumably to make more room for the hemoglobin molecules vital to the RBC's function.

Answer 2

Thanks :D

Answer 3

DNA Not The Same In Every Cell Of Body: Major Genetic Differences Between Blood And Tissue Cells Revealed
ScienceDaily (July 15, 2009) — Research by a group of Montreal scientists calls into question one of the most basic assumptions of human genetics: that when it comes to DNA, every cell in the body is essentially identical to every other cell. Their results appear in the July issue of the journal Human Mutation.
http://www.sciencedaily.com/releases/2009/07/090715131449.htm

Answer 4

YES, there is DNA in every cell in our body. Whether or not there is a gene variation or an emergent property from a cell to an organ is another topic. Thanks for the link Razorhead, but I think it is indirectly indicated in the article that it was still inconclusive. Nevertheless, I find this very interesting. Unfortunately, my school has stopped subscribing Wiley Interscience for me to check the actual Journal published in Human Mutation http://onlinelibrary.wiley.com/doi/10.1002/humu.21046/references
if any of you get a hold of the copy, please share.

Answer 5

is it safe to suggest that before maturity, RBC's contained nucleus, which houses the DNA? if so, then there is no exception. If, however, RBC's do not contain nucleus from the start of its development in the bone marrow, then I'd be damned to have missed this very important part in bio lectures I've attended.