The minimum number of copies of double stranded DNA that can be detected by a forensic scientist PCR based method is 128 if double stranded DNA that was extracted from a sample at a crime scene required 7 cycles of PCR to be detected how many copies of double stranded DNA were retrieved from the original sample?

Does anyone know how to do this? With the work please. :D

Question

The minimum number of copies of double stranded DNA that can be detected by a forensic scientist PCR based method is 128 if double stranded DNA that was extracted from a sample at a crime scene required 7 cycles of PCR to be detected how many copies of double stranded DNA were retrieved from the original sample?

Does anyone know how to do this? With the work please. :D

koikkara · Answer

http://www.swissforensic.org/publications/assets/dnachapter.pdf

agreene · Answer

$$\frac{128}{7} = 18.286 \approx 18$$
about 18 copies.