Approximately how many genes are estimated currently to compose the human genome?
A. 35,000
B. 100,000
C. 500,000
D. Over one million
A
The amount of DNA present in human cells is enormous; however, most of it (about 95%) consists of noncoding regions. Only about 5% of human cellular DNA makes up the genes. It appears that we have, at most, about 35,000 genes and not the millions originally thought by the amount of DNA present.
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