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There are 23 chromosomal pairs in the human genome. There are an estimated 20,000-25,000 genes in the human genome. According to an article published by Mihaela Pertea and Steven L Salzberg (of the University of Maryland and the Johns Hopkins University School of Medicine, respectively), there are approximately 22,333 genes in the human genome.1

References:

1. "Between a chicken and a grape: estimating the number of human genes" - http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2898077/

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11y ago

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