Sequencing Sequencing is used to the majority of genetic diagnostic testing. It can be used to decode all three billion base pairs in a human genome but testing is usually limited to sequencing single genes, which can reveal the presence of a mutation that might result in a disease or other disorder. Companies such as Illumina, Applied Biosystems, and Complete Genomics have developed new technologies for sequencing samples of DNA. (text 6) The picture on the right is what a typical sequencing machine looks like. |  |
