Scientists map cell's DNA history to embryonic origin
from Medical News Today
The fertilization of an egg gives rise to a genetically unique cell lineage that unfolds as cell division ensues — eventually to produce a mature organism that in the case of humans comprises some 100 million cells. Meanwhile, over the lifetime of the organism, cellular DNA accumulates mutations that are not inherited from parental — these so-called "somatic" mutations carry a record of the lifetime experiences of each cell.
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