In fact, the reverse transcription of the virus RNA into DNA had the effect that the oncogenes become integrated into the chromosomal DNA in the cells. It was then found that oncogene-like material could be detected in different species throughout the animal kingdom, in fact even in simple organisms with only a few cells. Furthermore, it was shown that the gene had a fixed position in the chromosomes of a certain species, and that the gene, when it constituted part of the cellular genetic material, was divided into fragments.