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Cell Phone Lets Your Secret Out
Your cell phone holds secrets about you. Besides the names and
(51) that you’ve programmed into it, traces of your DNA linger (逗留) on the device, according to a new study.
DNA is genetic material that
(52) in every cell. Like your fingerprint, your DNA is unique to you
(53) you have an identical twin. Scientists today routinely analyze DNA in blood, saliva (唾液), or hair left
(54) at the scene of a crime. The results often help detectives identify
(55) and their victims. Your cell phone can reveal more about you
(56) you might think.
Meghan J. McFadden, a scientist at McMaster University in Hamilton, Ontario, heard about a crime in which the suspect bled onto a cell phone and later dropped the
(57) . This made her wonder whether traces of DNA lingered on cell phones even when no blood was involved.
(58) , she and colleague Marga
A. card
B. keys
C. screen
D. speaker
