After four to six days on average, symptoms of Ebola can begin. The period between the transmission of the virus and the start of symptoms is called the incubation period. For Ebola, the incubation period can be as short as 2 days or as long as 21 days.he period between the transmission of the virus and the start of symptoms is called the incubation period. For Ebola, the incubation period can be as short as 2 days or as long as 21 days.
DNA profiling (also called DNA fingerprinting, DNA testing, or DNA typing) is a forensic technique used to identify individuals by characteristics of their DNA.lthough 99.9% of human DNA sequences are the same in every person, enough of the DNA is different that it is possible to distinguish one individual from another, unless they are monozygotic (identical) twins.
Gene expression profiling is a technique used in molecular biology to query the expression of thousands of genes simultaneously. In the context of cancer, gene expression profiling has been used to more accurately classify tumors.urrent cancer research makes use primarily of DNA microarrays in which an arrayed series of microscopic spots of pre-defined DNA oligonucleotides known as probes are covalently attached to a solid surface such as glass, forming what is known as a gene chip.