Surprisingly, the number of human genes seems to be less than a factor of two greater than that of many much simpler organisms, such as the roundworm and the fruit fly -- see table showing number of genes for different organisms.
http://www.edinformatics.com/math_science/human_genome.htm
The HGP has revealed that there are probably about 20,500 human genes. The completed human sequence can now identify their locations. This ultimate product of the HGP has given the world a resource of detailed information about the structure, organization and function of the complete set of human genes.
https://www.genome.gov/12011238/an-overview-of-the-human-genome-project/
An Overview of the Human Genome Project What was the Human Genome Project? The Human Genome Project (HGP) was the international, collaborative research program whose goal was the complete mapping and understanding of all the genes of human beings. All our genes together are known as our genome.
https://www.genome.gov/12011238/an-overview-of-the-human-genome-project/
These techniques include: 1  DNA Sequencing. 2  The Employment of Restriction Fragment-Length Polymorphisms (RFLP) 3  Yeast Artificial Chromosomes (YAC) 4  Bacterial Artificial Chromosomes (BAC) 5  The Polymerase Chain Reaction (PCR) 6  Electrophoresis.
https://www.genome.gov/12011238/an-overview-of-the-human-genome-project/
A startling finding of this first draft was that the number of human genes appeared to be significantly fewer than previous estimates, which ranged from 50,000 genes to as many as 140,000.The full sequence was completed and published in April 2003.
https://www.genome.gov/12011238/an-overview-of-the-human-genome-project/
How many genes does the Human Genome contain? The Human Genome Project has revealed that there are probably about 20,000-25,000 'haploid' protein coding genes. The completed human sequence can now identify their locations. But only about 1.5% of the genome codes for proteins, while the rest consists of non-coding RNA genes, regulatory sequences, introns, and noncoding DNA (once known as junk DNA).
http://www.edinformatics.com/math_science/human_genome.htm
It is estimated that the human body may contain over two million proteins, coded for by only 20,000 - 25,000 genes. The total number found in terran biological organisms is likely to exceed ten million, but nobody knows for sure.
http://www.wisegeek.org/how-many-proteins-exist.htm
The human genome of Homo sapiens is stored on 23 chromosome pairs. 22 of these are autosomal chromosome pairs, while the remaining pair is sex-determining. The haploid human genome occupies a total of just over 3 billion DNA base pairs that means 6 billion base pairs per diploid cell.
http://www.edinformatics.com/math_science/human_genome.htm
Sturtevant's very first gene map can be likened to the Wright brothers' first flight at Kitty Hawk. In turn, the Human Genome Project can be compared to the Apollo program bringing humanity to the moon. The hereditary material of all multi-cellular organisms is the famous double helix of deoxyribonucleic acid (DNA), which contains all of our genes.
https://www.genome.gov/12011238/an-overview-of-the-human-genome-project/
Useful genetic information found in DNA codes for a corresponding protein. Beans and corn are considered complimentary sources of dietary protein. Scientists have discovered that there are 20,000-25,000 protein-coding genes in the human genome. No one is entirely sure how many proteins exist. View slideshow of images above
http://www.wisegeek.org/how-many-proteins-exist.htm
approximately how many different genes can be found in a human cell?
Approximately, there are 20,000 to 25,000 protein-coding genes can be found in the human genome  There are 20,000 to 25,000 protein-coding genes in a human cell.