approximately how many genes do humans have?
How many base pairs are in a single human gene? There are about 3 billion base pairs in the human genome (DNA molecule), and around 20,000-25,000 genes, so that gives 120,000-150,00 base pairs per gene on average. But I hav … e no reason to think that genes are even approximately similar in length. Home Human Howmanyarethere 27 March 2011 3945 Views. There are approximately over 30,000 genes in the human body. In 2001 the Human Genome Project, a consortium of over 1000 scientists worldwide, finished sifting through the 3 billion bits of DNA in each human cell to map the ordering all of the human genes. Nobody knows yet exactly how many genes there are on any human chromosome. Here are some recent figures:   X chromosome 1529 genes (155 million base pairs) Y chromosom … e 344 genes (57 million base pairs). They found they had protein evidence for fewer than 6 per cent of these genes (compared with 60 per cent of the genome as a whole). That “suggested that many of these genes might not code for proteins under normal circumstances,” they say. Until a year ago, I anticipated that human existence would require 70,000-100,000 genes. In 2001, when the draft sequences were announced, it was revealed that the human genome contains somewhere between 30,000 and 35,000 protein-coding genes (International Human Genome Sequencing Consortium 2001; Venter et al. 2001). At present, Ensembl gives the number of protein-coding genes in the human genome as 21,724 known genes plus 1,017 novel genes. (“ Known genes ” correspond to an identifiable protein, “novel genes” look like they probably correspond to a protein but not yet a known one). Before the completion of the Human Genome Project, most biologists expected to There are 23 chromosomal pairs in the human genome. There are an estimated 20,000-25,000 genes … in the human genome. It is approximately 25000 per cell. Scientists estimate that there are between 20 000 and 25 000 genes in the human body. AQA Science GCSE Biology The human body has also 46 chromosomes which are completely different and shouldn't be muddled. And on this evidence, the human genome is set to get smaller still. “Our evidence suggests that the final number of true protein coding genes in the reference genome may lie closer to 19,000 than to 20,000.”. Which means that humans have fewer protein-coding genes even than nematode worms. But the number for humans has been the subject of constant revision since biologists first began the task of estimating them in the 1960s. Then, they believed humans could have as many as 2 million protein-coding genes. But by the time the human genome project began in the late 1990s, the highest estimates put the number at 100,000 and the number has continued to shrink.
Approximately over 30,000 genes.