<P> 3,234.83 Mb (Mega-basepairs) per haploid genome </P> <Tr> <Th> Number of chromosomes </Th> <Td> 23 pairs </Td> </Tr> <P> The human genome is the complete set of nucleic acid sequences for humans, encoded as DNA within the 23 chromosome pairs in cell nuclei and in a small DNA molecule found within individual mitochondria . Human genomes include both protein - coding DNA genes and noncoding DNA . Haploid human genomes, which are contained in germ cells (the egg and sperm gamete cells created in the meiosis phase of sexual reproduction before fertilization creates a zygote) consist of three billion DNA base pairs, while diploid genomes (found in somatic cells) have twice the DNA content . While there are significant differences among the genomes of human individuals (on the order of 0.1%), these are considerably smaller than the differences between humans and their closest living relatives, the chimpanzees (approximately 4%) and bonobos . </P> <P> The Human Genome Project produced the first complete sequences of individual human genomes, with the first draft sequence and initial analysis being published on February 12, 2001 . The human genome was the first of all vertebrates to be completely sequenced . As of 2012, thousands of human genomes have been completely sequenced, and many more have been mapped at lower levels of resolution . The resulting data are used worldwide in biomedical science, anthropology, forensics and other branches of science . There is a widely held expectation that genomic studies will lead to advances in the diagnosis and treatment of diseases, and to new insights in many fields of biology, including human evolution . </P>

How many chromosomes are in the human genome