The amount of DNA in the cells of each species of organism is specific. If the DNA molecules of the human body are joined together, the chain that will be created is 5-6 times the distance between the Earth and the Sun. The amount of DNA is expressed in picograms. 1 picogram = 10-12 grams. Chicken diploid cells contain 2.5 picograms and sperm contain 1.25 picograms of DNA. Human cells contain 5-6 picograms of DNA. An adult human body contains 100 picograms of DNA.