How is cell-free DNA (cdDNA) testing being used clinically?
A)To determine a person's risk for developing breast cancer
B)As an inexpensive alternative to standard paternity testing
C)As a less invasive way to determine the characteristics of cancer cells
D)As a way to determine whether a specific suspect has committed a rape

Question

Quizplus · Accepted Answer

Cell-free DNA is small pieces of nongenomic DNA circulating in the blood that can be collected from plasma or urine. These very small pieces of circulating cfDNA originate from the fetus in pregnant women or tumors in cancer patients. Because this technology is noninvasive, it offers a reduced risk of complications compared with the currently used invasive technologies. It can be used for some types of fetal testing. In oncology, cfDNA is being used to identify information about the tumor, including the genetics, amount of burden, mechanisms of progression, and drug resistance. Another advantage of this developing technology is that it costs much less

How Is Cell-Free DNA (CdDNA) Testing Being Used Clinically