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How many human genes were identified through research on the human genome?

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The impact of the Human Genome Project on cancer research — Human Genome Project The Human Genome Project, which operated from 1990 to 2003, provided researchers with basic information about the genetic content of the human organism, opening new avenues of discovery in fields such as cancer research.

Research conducted on the human genome indicates that there are an estimated 20,000 to 25,000 human genes.1

While the Human Genome Project (1990–2003) successfully determined the sequences of the three billion chemical base pairs that constitute human genomic DNA, identifying the exact number of genes remains an estimate within that range.21