The human genome is the full set of chromosomes found in a gamete. This information is subsequently doubled (at fertilization) and copied (at each cell division).
The human genome contains about 30,000 genes, of which we know the functions of about 50%, but, it has been discovered, about 97% of the DNA of chromosomes is actually made up of so-called non-coding regions - not genes, at all. Obviously important, as cells cannot exist without them, the presence of these regions is not yet understood.
Anne Evans
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