Approximately how many genes are in humans?

Answer 1

It is actually difficult to say exactly. Although the human genome has been entirely sequenced, scientists still are not entirely sure what a 'gene' is at the level of the DNA. Consequently, the estimated number of genes depends on who is doing the estimating and what their definition of gene is. Current estimates generally put the number in the vicinity of 25,000 - 30,000, with a range of something like 22,000 - 35,000.

BTW: The genome sequence is publicly available at:
http://genome.ucsc.edu/

Answer 2

The latest estimate from the human genome project seems to indicate that it is approximate 29,500. But this number changes all the time. When they first set out on the task of sequencing the human genome they estimated around 100,000 then this decreased to 75,000 and kept dropping. This was due to the discovery of muti-functional genes, which are genes with more that one product, this phenomena is achieved via alternate splicing of the transcript to form different mRNA products.

Answer 3

Yeah, we don't have a good grasp. But the real question is, how many different proteins are there? Each gene can be spliced infinite ways, and often gives rise to substantially different proteins. I think 100,000 proteins is a good number, but examining the proteome is extremely difficult since every protein has a different expression level, and the technology to detect proteins isn't really there yet; the best is mass spectrometry, while most scientists use antibodies, but that's against only one isoform of one protein (with some overlap), anyway generating 100,000 different antibodies isn't exactly feasible yet (unless you are a drug company with billions of dollars).

Answer 4

1. We don't know.
2. We think there are aboiut 30,000 genes.
3. The definition of "gene" has changed a bit in the past decade. It'd be more useful now to ask "how many proteins are made by our genome" -- and the new word for that is "proteome." We think perhaps 100,000 proteins.

Answer 5

Before the Genome Project, they estimated 100000 different human genes. After the Human Genome Project, they realized that there are actually only around 30000-40000 genes. However, we are still unsure of the exact number.

Answer 6

Different scientists say different things, and the number of human genes is still unknown. Some have estimated around 20,000 and others have said as many as 75,000.

Answer 7

I think 22, You get 1/2 from each parent

Answer 8

It depends how many can fit in your closet and dressers