How many nucleotides in human genome?

You've asked two different questions. There are 4 different bases in normal DNA, that are nucleosides whose names are abbreviated as A, C, G and T. In the human genome, there are about 3 billion bases if you go from the beginning to the end. read more

The published chimpanzee genome differs from that of the human genome by 1.23% in direct sequence comparisons. Around 20% of this figure is accounted for by variation within each species, leaving only ~1.06% consistent sequence divergence between humans and chimps at shared genes. read more

The main goals of the Human Genome Project were to provide a complete and accurate sequence of the 3 billion DNA base pairs that make up the human genome and to find all of the estimated 20,000 to 25,000 human genes. read more